Add i18n Support

1. Remove Qt Linguist.
2. Add GNU gettext libraries.
3. Modified source codes to meet with i18n support.

90 files changed, 1234 insertions, 1167 deletions

diff --git a/src/ui/FileEncryptionDialog.cpp b/src/ui/FileEncryptionDialog.cpp
index d141df1e..cad0dcb1 100755
--- a/src/ui/FileEncryptionDialog.cpp
+++ b/src/ui/FileEncryptionDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -29,17 +29,16 @@
 
 namespace GpgFrontend::UI {
 FileEncryptionDialog::FileEncryptionDialog(KeyIdArgsListPtr keyList,
-                                           DialogAction action,
-                                           QWidget* parent)
+                                           DialogAction action, QWidget* parent)
     : QDialog(parent), mAction(action) {
   if (mAction == Decrypt) {
-    setWindowTitle(tr("Decrypt File"));
+    setWindowTitle(_("Decrypt File"));
   } else if (mAction == Encrypt) {
-    setWindowTitle(tr("Encrypt File"));
+    setWindowTitle(_("Encrypt File"));
   } else if (mAction == Sign) {
-    setWindowTitle(tr("Sign File"));
+    setWindowTitle(_("Sign File"));
   } else if (mAction == Verify) {
-    setWindowTitle(tr("Verify File"));
+    setWindowTitle(_("Verify File"));
   }
 
   setModal(true);
@@ -49,19 +48,19 @@ FileEncryptionDialog::FileEncryptionDialog(KeyIdArgsListPtr keyList,
   connect(buttonBox, SIGNAL(accepted()), this, SLOT(slotExecuteAction()));
   connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
-  auto* groupBox1 = new QGroupBox(tr("Input Parameters"));
+  auto* groupBox1 = new QGroupBox(_("Input Parameters"));
 
   /* Setup input & Outputfileselection*/
   inputFileEdit = new QLineEdit();
   auto* fb1 = new QPushButton("Select");
   connect(fb1, SIGNAL(clicked()), this, SLOT(slotSelectInputFile()));
-  auto* fl1 = new QLabel(tr("Target File"));
+  auto* fl1 = new QLabel(_("Target File"));
   fl1->setBuddy(inputFileEdit);
 
   outputFileEdit = new QLineEdit();
   auto* fb2 = new QPushButton("Select");
   connect(fb2, SIGNAL(clicked()), this, SLOT(slotSelectOutputFile()));
-  auto* fl2 = new QLabel(tr("Output File"));
+  auto* fl2 = new QLabel(_("Output File"));
   fl2->setBuddy(outputFileEdit);
 
   auto* gLayout = new QGridLayout();
@@ -77,7 +76,7 @@ FileEncryptionDialog::FileEncryptionDialog(KeyIdArgsListPtr keyList,
   } else {
     auto* sfb1 = new QPushButton("Select");
     connect(sfb1, SIGNAL(clicked()), this, SLOT(slotSelectSignFile()));
-    auto* sfl1 = new QLabel(tr("Signature File(.sig) Path"));
+    auto* sfl1 = new QLabel(_("Signature File(.sig) Path"));
     sfl1->setBuddy(signFileEdit);
 
     gLayout->addWidget(sfl1, 1, 0);
@@ -114,8 +113,7 @@ FileEncryptionDialog::FileEncryptionDialog(KeyIdArgsListPtr keyList,
         return true;
     });
 
-  if (mAction == Decrypt)
-    mKeyList->setDisabled(true);
+  if (mAction == Decrypt) mKeyList->setDisabled(true);
 
   mKeyList->slotRefresh();
   mKeyList->setChecked(keyList);
@@ -136,15 +134,14 @@ FileEncryptionDialog::FileEncryptionDialog(KeyIdArgsListPtr keyList,
 }
 
 void FileEncryptionDialog::slotSelectInputFile() {
-  QString path = "";
+  QString path;
   if (inputFileEdit->text().size() > 0) {
     path = QFileInfo(inputFileEdit->text()).absolutePath();
   }
 
-  //    QString infileName = QFileDialog::getOpenFileName(this, tr("Open File"),
-  //    path, tr("Files") + tr("All Files (*)"));
-  QString infileName =
-      QFileDialog::getOpenFileName(this, tr("Open File"), path);
+  //    QString infileName = QFileDialog::getOpenFileName(this, _("Open File"),
+  //    path, _("Files") + _("All Files (*)"));
+  QString infileName = QFileDialog::getOpenFileName(this, _("Open File"), path);
   inputFileEdit->setText(infileName);
 
   // try to find a matching output-filename, if not yet done
@@ -169,26 +166,26 @@ void FileEncryptionDialog::slotSelectInputFile() {
 }
 
 void FileEncryptionDialog::slotSelectOutputFile() {
-  QString path = "";
+  QString path;
   if (outputFileEdit->text().size() > 0) {
     path = QFileInfo(outputFileEdit->text()).absolutePath();
   }
 
   QString outfileName =
-      QFileDialog::getSaveFileName(this, tr("Save File"), path, nullptr,
-                                   nullptr, QFileDialog::DontConfirmOverwrite);
+      QFileDialog::getSaveFileName(this, _("Save File"), path, nullptr, nullptr,
+                                   QFileDialog::DontConfirmOverwrite);
   outputFileEdit->setText(outfileName);
 }
 
 void FileEncryptionDialog::slotSelectSignFile() {
-  QString path = "";
+  QString path;
   if (signFileEdit->text().size() > 0) {
     path = QFileInfo(signFileEdit->text()).absolutePath();
   }
 
   QString signfileName =
-      QFileDialog::getSaveFileName(this, tr("Open File"), path, nullptr,
-                                   nullptr, QFileDialog::DontConfirmOverwrite);
+      QFileDialog::getSaveFileName(this, _("Open File"), path, nullptr, nullptr,
+                                   QFileDialog::DontConfirmOverwrite);
   signFileEdit->setText(signfileName);
 
   if (inputFileEdit->text().size() == 0 &&
@@ -203,7 +200,7 @@ void FileEncryptionDialog::slotExecuteAction() {
   QFile infile;
   infile.setFileName(inputFileEdit->text());
   if (!infile.open(QIODevice::ReadOnly)) {
-    statusLabel->setText(tr("Couldn't open file"));
+    statusLabel->setText(_("Couldn't open file"));
     inputFileEdit->setStyleSheet("QLineEdit { background: yellow }");
     return;
   }
@@ -223,8 +220,8 @@ void FileEncryptionDialog::slotExecuteAction() {
     if (gpgme_err_code(err) != GPG_ERR_NO_ERROR) {
       qDebug() << "Error" << gpgme_strerror(err);
 
-      QMessageBox::warning(this, tr("Error"),
-                           tr("Error Occurred During Encryption"));
+      QMessageBox::warning(this, _("Error"),
+                           _("Error Occurred During Encryption"));
       return;
     }
   }
@@ -236,8 +233,8 @@ void FileEncryptionDialog::slotExecuteAction() {
         BasicOperator::GetInstance().Decrypt(in_data, out_data, result);
     if (gpgme_err_code(err) != GPG_ERR_NO_ERROR) {
       qDebug() << "Error" << gpgme_strerror(err);
-      QMessageBox::warning(this, tr("Error"),
-                           tr("Error Occurred During Decryption"));
+      QMessageBox::warning(this, _("Error"),
+                           _("Error Occurred During Decryption"));
       return;
     }
   }
@@ -249,8 +246,8 @@ void FileEncryptionDialog::slotExecuteAction() {
         std::move(keys), in_data, out_data, GPGME_SIG_MODE_DETACH, result);
     if (gpgme_err_code(err) != GPG_ERR_NO_ERROR) {
       qDebug() << "Error" << gpgme_strerror(err);
-      QMessageBox::warning(this, tr("Error"),
-                           tr("Error Occurred During Signature"));
+      QMessageBox::warning(this, _("Error"),
+                           _("Error Occurred During Signature"));
       return;
     }
   }
@@ -270,12 +267,8 @@ void FileEncryptionDialog::slotExecuteAction() {
   accept();
 }
 
-void FileEncryptionDialog::slotShowKeyList() {
-  mKeyList->show();
-}
+void FileEncryptionDialog::slotShowKeyList() { mKeyList->show(); }
 
-void FileEncryptionDialog::slotHideKeyList() {
-  mKeyList->hide();
-}
+void FileEncryptionDialog::slotHideKeyList() { mKeyList->hide(); }
 
 }  // namespace GpgFrontend::UI
diff --git a/src/ui/FileEncryptionDialog.h b/src/ui/FileEncryptionDialog.h
index a3e56564..613f84e7 100755
--- a/src/ui/FileEncryptionDialog.h
+++ b/src/ui/FileEncryptionDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -51,8 +51,7 @@ class FileEncryptionDialog : public QDialog {
    * @param keyList
    * @param parent
    */
-  FileEncryptionDialog(KeyIdArgsListPtr keyList,
-                       DialogAction action,
+  FileEncryptionDialog(KeyIdArgsListPtr keyList, DialogAction action,
                        QWidget* parent = nullptr);
 
  public slots:
diff --git a/src/ui/FindWidget.cpp b/src/ui/FindWidget.cpp
index f9b92685..6326b119 100644
--- a/src/ui/FindWidget.cpp
+++ b/src/ui/FindWidget.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -30,13 +30,14 @@ FindWidget::FindWidget(QWidget* parent, QTextEdit* edit) : QWidget(parent) {
   mTextpage = edit;
   findEdit = new QLineEdit(this);
   auto* closeButton = new QPushButton(
-      this->style()->standardIcon(QStyle::SP_TitleBarCloseButton), "", this);
-  auto* nextButton = new QPushButton(QIcon(":button_next.png"), "");
+      this->style()->standardIcon(QStyle::SP_TitleBarCloseButton), QString(),
+      this);
+  auto* nextButton = new QPushButton(QIcon(":button_next.png"), QString());
   auto* previousButton = new QPushButton(QIcon(":button_previous.png"), "");
 
   auto* notificationWidgetLayout = new QHBoxLayout(this);
   notificationWidgetLayout->setContentsMargins(10, 0, 0, 0);
-  notificationWidgetLayout->addWidget(new QLabel(tr("Find:")));
+  notificationWidgetLayout->addWidget(new QLabel(QString(_("Find")) + ": "));
   notificationWidgetLayout->addWidget(findEdit, 2);
   notificationWidgetLayout->addWidget(nextButton);
   notificationWidgetLayout->addWidget(previousButton);
diff --git a/src/ui/FindWidget.h b/src/ui/FindWidget.h
index f57f95a6..e4cbdaab 100644
--- a/src/ui/FindWidget.h
+++ b/src/ui/FindWidget.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/GpgFrontendUI.h b/src/ui/GpgFrontendUI.h
index 593ed872..c5d80d01 100644
--- a/src/ui/GpgFrontendUI.h
+++ b/src/ui/GpgFrontendUI.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -26,11 +26,24 @@
 #define GPGFRONTEND_GPGFRONTENDUI_H
 
 #include <GpgFrontend.h>
-#include <easyloggingpp/easylogging++.h>
 
 #include <QtCore>
 #include <QtNetwork>
 #include <QtPrintSupport>
 #include <QtWidgets>
 
+/**
+ * Resources File(s) Path Vars
+ */
+#if defined(MACOS) && defined(RELEASE)
+#define RESOURCE_DIR(appDir) (appDir + "/../Resources/")
+#define RESOURCE_DIR_BOOST_PATH(appDir) (appDir / ".." / "Resources")
+#elif defined(LINUX) && defined(RELEASE)
+#define RESOURCE_DIR(appDir) (appDir + "/../share/")
+#define RESOURCE_DIR_BOOST_PATH(appDir) (appDir / ".." / "share")
+#else
+#define RESOURCE_DIR(appDir) (appDir)
+#define RESOURCE_DIR_BOOST_PATH(appDir) (appDir)
+#endif
+
 #endif  // GPGFRONTEND_GPGFRONTENDUI_H
diff --git a/src/ui/KeyImportDetailDialog.cpp b/src/ui/KeyImportDetailDialog.cpp
index 92c73f0e..321de3a6 100644
--- a/src/ui/KeyImportDetailDialog.cpp
+++ b/src/ui/KeyImportDetailDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -33,11 +33,11 @@ KeyImportDetailDialog::KeyImportDetailDialog(GpgImportInformation result,
   // If no key for import found, just show a message
   if (mResult.considered == 0) {
     if (automatic)
-      QMessageBox::information(nullptr, tr("Key Update Details"),
-                               tr("No keys found"));
+      QMessageBox::information(nullptr, _("Key Update Details"),
+                               _("No keys found"));
     else
-      QMessageBox::information(nullptr, tr("Key Import Details"),
-                               tr("No keys found to import"));
+      QMessageBox::information(nullptr, _("Key Import Details"),
+                               _("No keys found to import"));
     return;
   }
 
@@ -54,9 +54,9 @@ KeyImportDetailDialog::KeyImportDetailDialog(GpgImportInformation result,
 
   this->setLayout(mvbox);
   if (automatic)
-    this->setWindowTitle(tr("Key Update Details"));
+    this->setWindowTitle(_("Key Update Details"));
   else
-    this->setWindowTitle(tr("Key Import Details"));
+    this->setWindowTitle(_("Key Import Details"));
 
   this->resize(QSize(600, 300));
   this->setModal(true);
@@ -65,48 +65,52 @@ KeyImportDetailDialog::KeyImportDetailDialog(GpgImportInformation result,
 
 void KeyImportDetailDialog::createGeneralInfoBox() {
   // GridBox for general import information
-  generalInfoBox = new QGroupBox(tr("General key info"));
+  generalInfoBox = new QGroupBox(_("General key info"));
   auto* generalInfoBoxLayout = new QGridLayout(generalInfoBox);
 
-  generalInfoBoxLayout->addWidget(new QLabel(tr("Considered:")), 1, 0);
+  generalInfoBoxLayout->addWidget(new QLabel(QString(_("Considered")) + ": "),
+                                  1, 0);
   generalInfoBoxLayout->addWidget(
       new QLabel(QString::number(mResult.considered)), 1, 1);
   int row = 2;
   if (mResult.unchanged != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Public unchanged:")), row,
-                                    0);
+    generalInfoBoxLayout->addWidget(
+        new QLabel(QString(_("Public unchanged")) + ": "), row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.unchanged)), row, 1);
     row++;
   }
   if (mResult.imported != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Imported:")), row, 0);
+    generalInfoBoxLayout->addWidget(new QLabel(QString(_("Imported")) + ": "),
+                                    row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.imported)), row, 1);
     row++;
   }
   if (mResult.not_imported != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Not imported:")), row, 0);
+    generalInfoBoxLayout->addWidget(
+        new QLabel(QString(_("Not Imported")) + ": "), row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.not_imported)), row, 1);
     row++;
   }
   if (mResult.secret_read != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Private read:")), row, 0);
+    generalInfoBoxLayout->addWidget(
+        new QLabel(QString(_("Private Read")) + ": "), row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.secret_read)), row, 1);
     row++;
   }
   if (mResult.secret_imported != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Private imported:")), row,
-                                    0);
+    generalInfoBoxLayout->addWidget(
+        new QLabel(QString(_("Private Imported")) + ": "), row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.secret_imported)), row, 1);
     row++;
   }
   if (mResult.secret_unchanged != 0) {
-    generalInfoBoxLayout->addWidget(new QLabel(tr("Private unchanged:")), row,
-                                    0);
+    generalInfoBoxLayout->addWidget(
+        new QLabel(QString(_("Private Unchanged")) + ": "), row, 0);
     generalInfoBoxLayout->addWidget(
         new QLabel(QString::number(mResult.secret_unchanged)), row, 1);
     row++;
@@ -115,7 +119,7 @@ void KeyImportDetailDialog::createGeneralInfoBox() {
 
 void KeyImportDetailDialog::createKeysTable() {
   LOG(INFO) << "KeyImportDetailDialog::createKeysTable() Called";
-  
+
   keysTable = new QTableWidget(this);
   keysTable->setRowCount(0);
   keysTable->setColumnCount(4);
@@ -124,8 +128,7 @@ void KeyImportDetailDialog::createKeysTable() {
   keysTable->setSelectionMode(QAbstractItemView::NoSelection);
 
   QStringList headerLabels;
-  headerLabels << tr("Name") << tr("Email") << tr("Status")
-               << tr("Fingerprint");
+  headerLabels << _("Name") << _("Email") << _("Status") << _("Fingerprint");
   keysTable->verticalHeader()->hide();
 
   keysTable->setHorizontalHeaderLabels(headerLabels);
@@ -154,27 +157,27 @@ QString KeyImportDetailDialog::getStatusString(int keyStatus) {
   QString statusString;
   // keystatus is greater than 15, if key is private
   if (keyStatus > 15) {
-    statusString.append(tr("private"));
+    statusString.append(_("Private"));
     keyStatus = keyStatus - 16;
   } else {
-    statusString.append(tr("public"));
+    statusString.append(_("Public"));
   }
   if (keyStatus == 0) {
-    statusString.append(", " + tr("unchanged"));
+    statusString.append(", " + QString(_("Unchanged")));
   } else {
     if (keyStatus == 1) {
-      statusString.append(", " + tr("new key"));
+      statusString.append(", " + QString(_("New Key")));
     } else {
       if (keyStatus > 7) {
-        statusString.append(", " + tr("new subkey"));
+        statusString.append(", " + QString(_("New Subkey")));
         keyStatus = keyStatus - 8;
       }
       if (keyStatus > 3) {
-        statusString.append(", " + tr("new signature"));
+        statusString.append(", " + QString(_("New Signature")));
         keyStatus = keyStatus - 4;
       }
       if (keyStatus > 1) {
-        statusString.append(", " + tr("new uid"));
+        statusString.append(", " + QString(_("New UID")));
         keyStatus = keyStatus - 2;
       }
     }
diff --git a/src/ui/KeyImportDetailDialog.h b/src/ui/KeyImportDetailDialog.h
index e3137503..0c7d6807 100644
--- a/src/ui/KeyImportDetailDialog.h
+++ b/src/ui/KeyImportDetailDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -26,6 +26,7 @@
 #define __KEYIMPORTDETAILSDIALOG_H__
 
 #include <gpg/function/GpgKeyImportExportor.h>
+
 #include "gpg/GpgContext.h"
 #include "ui/GpgFrontendUI.h"
 
@@ -34,8 +35,7 @@ class KeyImportDetailDialog : public QDialog {
   Q_OBJECT
 
  public:
-  KeyImportDetailDialog(GpgImportInformation result,
-                        bool automatic,
+  KeyImportDetailDialog(GpgImportInformation result, bool automatic,
                         QWidget* parent = nullptr);
 
  private:
diff --git a/src/ui/KeyMgmt.cpp b/src/ui/KeyMgmt.cpp
index df476fc9..0c3d6a14 100755
--- a/src/ui/KeyMgmt.cpp
+++ b/src/ui/KeyMgmt.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -88,7 +88,7 @@ KeyMgmt::KeyMgmt(QWidget* parent)
     this->settings.setValue("keymgmt/setWindowSize", true);
   }
 
-  setWindowTitle(tr("Key Pair Management"));
+  setWindowTitle(_("Key Pair Management"));
   mKeyList->addMenuAction(deleteSelectedKeysAct);
   mKeyList->addMenuAction(showKeyDetailsAct);
 
@@ -97,91 +97,90 @@ KeyMgmt::KeyMgmt(QWidget* parent)
 }
 
 void KeyMgmt::createActions() {
-  openKeyFileAct = new QAction(tr("&Open"), this);
-  openKeyFileAct->setShortcut(tr("Ctrl+O"));
-  openKeyFileAct->setToolTip(tr("Open Key File"));
+  openKeyFileAct = new QAction(_("Open"), this);
+  openKeyFileAct->setShortcut(QKeySequence(_("Ctrl+O")));
+  openKeyFileAct->setToolTip(_("Open Key File"));
   connect(openKeyFileAct, SIGNAL(triggered()), this,
           SLOT(slotImportKeyFromFile()));
 
-  closeAct = new QAction(tr("&Close"), this);
-  closeAct->setShortcut(tr("Ctrl+Q"));
+  closeAct = new QAction(_("Close"), this);
+  closeAct->setShortcut(QKeySequence(_("Ctrl+Q")));
   closeAct->setIcon(QIcon(":exit.png"));
-  closeAct->setToolTip(tr("Close"));
+  closeAct->setToolTip(_("Close"));
   connect(closeAct, SIGNAL(triggered()), this, SLOT(close()));
 
-  generateKeyPairAct = new QAction(tr("New Keypair"), this);
-  generateKeyPairAct->setShortcut(tr("Ctrl+N"));
+  generateKeyPairAct = new QAction(_("New Keypair"), this);
+  generateKeyPairAct->setShortcut(QKeySequence(_("Ctrl+N")));
   generateKeyPairAct->setIcon(QIcon(":key_generate.png"));
-  generateKeyPairAct->setToolTip(tr("Generate KeyPair"));
+  generateKeyPairAct->setToolTip(_("Generate KeyPair"));
   connect(generateKeyPairAct, SIGNAL(triggered()), this,
           SLOT(slotGenerateKeyDialog()));
 
-  generateSubKeyAct = new QAction(tr("New Subkey"), this);
-  generateSubKeyAct->setShortcut(tr("Ctrl+Shift+N"));
+  generateSubKeyAct = new QAction(_("New Subkey"), this);
+  generateSubKeyAct->setShortcut(QKeySequence(_("Ctrl+Shift+N")));
   generateSubKeyAct->setIcon(QIcon(":key_generate.png"));
-  generateSubKeyAct->setToolTip(tr("Generate Subkey For Selected KeyPair"));
+  generateSubKeyAct->setToolTip(_("Generate Subkey For Selected KeyPair"));
   connect(generateSubKeyAct, SIGNAL(triggered()), this,
           SLOT(slotGenerateSubKey()));
 
-  importKeyFromFileAct = new QAction(tr("&File"), this);
+  importKeyFromFileAct = new QAction(_("File"), this);
   importKeyFromFileAct->setIcon(QIcon(":import_key_from_file.png"));
-  importKeyFromFileAct->setToolTip(tr("Import New Key From File"));
+  importKeyFromFileAct->setToolTip(_("Import New Key From File"));
   connect(importKeyFromFileAct, SIGNAL(triggered()), this,
           SLOT(slotImportKeyFromFile()));
 
-  importKeyFromClipboardAct = new QAction(tr("&Clipboard"), this);
+  importKeyFromClipboardAct = new QAction(_("Clipboard"), this);
   importKeyFromClipboardAct->setIcon(QIcon(":import_key_from_clipboard.png"));
-  importKeyFromClipboardAct->setToolTip(tr("Import New Key From Clipboard"));
+  importKeyFromClipboardAct->setToolTip(_("Import New Key From Clipboard"));
   connect(importKeyFromClipboardAct, SIGNAL(triggered()), this,
           SLOT(slotImportKeyFromClipboard()));
 
-  importKeyFromKeyServerAct = new QAction(tr("&Keyserver"), this);
+  importKeyFromKeyServerAct = new QAction(_("Keyserver"), this);
   importKeyFromKeyServerAct->setIcon(QIcon(":import_key_from_server.png"));
-  importKeyFromKeyServerAct->setToolTip(tr("Import New Key From Keyserver"));
+  importKeyFromKeyServerAct->setToolTip(_("Import New Key From Keyserver"));
   connect(importKeyFromKeyServerAct, SIGNAL(triggered()), this,
           SLOT(slotImportKeyFromKeyServer()));
 
-  exportKeyToClipboardAct = new QAction(tr("Export To &Clipboard"), this);
+  exportKeyToClipboardAct = new QAction(_("Export To Clipboard"), this);
   exportKeyToClipboardAct->setIcon(QIcon(":export_key_to_clipboard.png"));
-  exportKeyToClipboardAct->setToolTip(
-      tr("Export Selected Key(s) To Clipboard"));
+  exportKeyToClipboardAct->setToolTip(_("Export Selected Key(s) To Clipboard"));
   connect(exportKeyToClipboardAct, SIGNAL(triggered()), this,
           SLOT(slotExportKeyToClipboard()));
 
-  exportKeyToFileAct = new QAction(tr("Export To &File"), this);
+  exportKeyToFileAct = new QAction(_("Export To File"), this);
   exportKeyToFileAct->setIcon(QIcon(":export_key_to_file.png"));
-  exportKeyToFileAct->setToolTip(tr("Export Selected Key(s) To File"));
+  exportKeyToFileAct->setToolTip(_("Export Selected Key(s) To File"));
   connect(exportKeyToFileAct, SIGNAL(triggered()), this,
           SLOT(slotExportKeyToFile()));
 
-  deleteSelectedKeysAct = new QAction(tr("Delete Selected Key(s)"), this);
-  deleteSelectedKeysAct->setToolTip(tr("Delete the Selected keys"));
+  deleteSelectedKeysAct = new QAction(_("Delete Selected Key(s)"), this);
+  deleteSelectedKeysAct->setToolTip(_("Delete the Selected keys"));
   connect(deleteSelectedKeysAct, SIGNAL(triggered()), this,
           SLOT(slotDeleteSelectedKeys()));
 
-  deleteCheckedKeysAct = new QAction(tr("Delete Checked Key(s)"), this);
-  deleteCheckedKeysAct->setToolTip(tr("Delete the Checked keys"));
+  deleteCheckedKeysAct = new QAction(_("Delete Checked Key(s)"), this);
+  deleteCheckedKeysAct->setToolTip(_("Delete the Checked keys"));
   deleteCheckedKeysAct->setIcon(QIcon(":button_delete.png"));
   connect(deleteCheckedKeysAct, SIGNAL(triggered()), this,
           SLOT(slotDeleteCheckedKeys()));
 
-  showKeyDetailsAct = new QAction(tr("Show Key Details"), this);
-  showKeyDetailsAct->setToolTip(tr("Show Details for this Key"));
+  showKeyDetailsAct = new QAction(_("Show Key Details"), this);
+  showKeyDetailsAct->setToolTip(_("Show Details for this Key"));
   connect(showKeyDetailsAct, SIGNAL(triggered()), this,
           SLOT(slotShowKeyDetails()));
 }
 
 void KeyMgmt::createMenus() {
-  fileMenu = menuBar()->addMenu(tr("&File"));
+  fileMenu = menuBar()->addMenu(_("File"));
   fileMenu->addAction(openKeyFileAct);
   fileMenu->addAction(closeAct);
 
-  keyMenu = menuBar()->addMenu(tr("&Key"));
-  generateKeyMenu = keyMenu->addMenu(tr("&Generate Key"));
+  keyMenu = menuBar()->addMenu(_("Key"));
+  generateKeyMenu = keyMenu->addMenu(_("Generate Key"));
   generateKeyMenu->addAction(generateKeyPairAct);
   generateKeyMenu->addAction(generateSubKeyAct);
 
-  importKeyMenu = keyMenu->addMenu(tr("&Import Key"));
+  importKeyMenu = keyMenu->addMenu(_("Import Key"));
   importKeyMenu->addAction(importKeyFromFileAct);
   importKeyMenu->addAction(importKeyFromClipboardAct);
   importKeyMenu->addAction(importKeyFromKeyServerAct);
@@ -192,7 +191,7 @@ void KeyMgmt::createMenus() {
 }
 
 void KeyMgmt::createToolBars() {
-  QToolBar* keyToolBar = addToolBar(tr("Key"));
+  QToolBar* keyToolBar = addToolBar(_("Key"));
   keyToolBar->setObjectName("keytoolbar");
 
   // add button with popup menu for import
@@ -200,8 +199,8 @@ void KeyMgmt::createToolBars() {
   generateToolButton->setMenu(generateKeyMenu);
   generateToolButton->setPopupMode(QToolButton::InstantPopup);
   generateToolButton->setIcon(QIcon(":key_generate.png"));
-  generateToolButton->setText(tr("Generate"));
-  generateToolButton->setToolTip(tr("Generate A New Keypair or Subkey"));
+  generateToolButton->setText(_("Generate"));
+  generateToolButton->setToolTip(_("Generate A New Keypair or Subkey"));
   generateToolButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
   keyToolBar->addWidget(generateToolButton);
 
@@ -210,8 +209,8 @@ void KeyMgmt::createToolBars() {
   toolButton->setMenu(importKeyMenu);
   toolButton->setPopupMode(QToolButton::InstantPopup);
   toolButton->setIcon(QIcon(":key_import.png"));
-  toolButton->setToolTip(tr("Import key"));
-  toolButton->setText(tr("Import Key"));
+  toolButton->setToolTip(_("Import key"));
+  toolButton->setText(_("Import Key"));
   toolButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
   keyToolBar->addWidget(toolButton);
 
@@ -231,8 +230,8 @@ void KeyMgmt::slotImportKeys(const std::string& in_buffer) {
 
 void KeyMgmt::slotImportKeyFromFile() {
   QString file_name = QFileDialog::getOpenFileName(
-      this, tr("Open Key"), "",
-      tr("Key Files") + " (*.asc *.txt);;" + tr("Keyring files") +
+      this, _("Open Key"), QString(),
+      QString(_("Key Files")) + " (*.asc *.txt);;" + _("Keyring files") +
           " (*.gpg);;All Files (*)");
   if (!file_name.isNull()) {
     slotImportKeys(read_all_data_in_file(file_name.toStdString()));
@@ -277,10 +276,12 @@ void KeyMgmt::deleteKeysWithWarning(KeyIdArgsListPtr key_ids) {
   }
 
   int ret = QMessageBox::warning(
-      this, tr("Deleting Keys"),
-      "<b>" + tr("Are you sure that you want to delete the following keys?") +
+      this, _("Deleting Keys"),
+      "<b>" +
+          QString(
+              _("Are you sure that you want to delete the following keys?")) +
           "</b><br/><br/>" + keynames + +"<br/>" +
-          tr("The action can not be undone."),
+          _("The action can not be undone."),
       QMessageBox::No | QMessageBox::Yes);
 
   if (ret == QMessageBox::Yes) {
@@ -296,7 +297,7 @@ void KeyMgmt::slotShowKeyDetails() {
   auto key = GpgKeyGetter::GetInstance().GetKey(keys_selected->front());
 
   if (!key.good()) {
-    QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+    QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
     return;
   }
 
@@ -313,19 +314,19 @@ void KeyMgmt::slotExportKeyToFile() {
   auto key =
       GpgKeyGetter::GetInstance().GetKey(mKeyList->getSelected()->front());
   if (!key.good()) {
-    QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+    QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
     return;
   }
   QString fileString = QString::fromStdString(key.name() + " " + key.email() +
                                               "(" + key.id() + ")_pub.asc");
 
   QString file_name = QFileDialog::getSaveFileName(
-      this, tr("Export Key To File"), fileString,
-      tr("Key Files") + " (*.asc *.txt);;All Files (*)");
+      this, _("Export Key To File"), fileString,
+      QString(_("Key Files")) + " (*.asc *.txt);;All Files (*)");
 
   write_buffer_to_file(file_name.toStdString(), *key_export_data);
 
-  emit signalStatusBarChanged(QString(tr("key(s) exported")));
+  emit signalStatusBarChanged(QString(_("key(s) exported")));
 }
 
 void KeyMgmt::slotExportKeyToClipboard() {
@@ -349,19 +350,19 @@ void KeyMgmt::slotGenerateSubKey() {
   auto keys_selected = mKeyList->getSelected();
   if (keys_selected->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one KeyPair before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one KeyPair before doing this operation."));
     return;
   }
   const auto key = GpgKeyGetter::GetInstance().GetKey(keys_selected->front());
   if (!key.good()) {
-    QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+    QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
     return;
   }
   if (!key.is_private_key()) {
-    QMessageBox::critical(nullptr, tr("Invalid Operation"),
-                          tr("If a key pair does not have a private key then "
-                             "it will not be able to generate sub-keys."));
+    QMessageBox::critical(nullptr, _("Invalid Operation"),
+                          _("If a key pair does not have a private key then "
+                            "it will not be able to generate sub-keys."));
     return;
   }
 
diff --git a/src/ui/KeyMgmt.h b/src/ui/KeyMgmt.h
index f96fbf38..1bf350f7 100755
--- a/src/ui/KeyMgmt.h
+++ b/src/ui/KeyMgmt.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/KeyServerImportDialog.cpp b/src/ui/KeyServerImportDialog.cpp
index 866e378a..b529637f 100644
--- a/src/ui/KeyServerImportDialog.cpp
+++ b/src/ui/KeyServerImportDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -44,17 +44,17 @@ KeyServerImportDialog::KeyServerImportDialog(KeyList* keyList, bool automatic,
   }
 
   // Buttons
-  closeButton = createButton(tr("&Close"), SLOT(close()));
-  importButton = createButton(tr("&Import ALL"), SLOT(slotImport()));
+  closeButton = createButton(_("Close"), SLOT(close()));
+  importButton = createButton(_("Import ALL"), SLOT(slotImport()));
   importButton->setDisabled(true);
-  searchButton = createButton(tr("&Search"), SLOT(slotSearch()));
+  searchButton = createButton(_("Search"), SLOT(slotSearch()));
 
   // Line edit for search string
-  searchLabel = new QLabel(tr("Search String:"));
+  searchLabel = new QLabel(QString(_("Search String")) + _(": "));
   searchLineEdit = new QLineEdit();
 
   // combobox for keyserverlist
-  keyServerLabel = new QLabel(tr("Key Server:"));
+  keyServerLabel = new QLabel(QString(_("Key Server")) + _(": "));
   keyServerComboBox = createComboBox();
 
   // table containing the keys found
@@ -101,9 +101,9 @@ KeyServerImportDialog::KeyServerImportDialog(KeyList* keyList, bool automatic,
 
   this->setLayout(mainLayout);
   if (automatic)
-    this->setWindowTitle(tr("Update Keys from Keyserver"));
+    this->setWindowTitle(_("Update Keys from Keyserver"));
   else
-    this->setWindowTitle(tr("Import Keys from Keyserver"));
+    this->setWindowTitle(_("Import Keys from Keyserver"));
 
   if (automatic) {
     this->setFixedSize(240, 42);
@@ -168,7 +168,7 @@ void KeyServerImportDialog::createKeysTable() {
   keysTable->setSelectionMode(QAbstractItemView::SingleSelection);
 
   QStringList labels;
-  labels << tr("UID") << tr("Creation date") << tr("KeyID") << tr("Tag");
+  labels << _("UID") << _("Creation date") << _("KeyID") << _("Tag");
   keysTable->horizontalHeader()->setSectionResizeMode(
       0, QHeaderView::ResizeToContents);
   keysTable->setHorizontalHeaderLabels(labels);
@@ -190,7 +190,7 @@ void KeyServerImportDialog::setMessage(const QString& text, bool error) {
 
 void KeyServerImportDialog::slotSearch() {
   if (searchLineEdit->text().isEmpty()) {
-    setMessage("<h4>" + tr("Text is empty.") + "</h4>", false);
+    setMessage("<h4>" + QString(_("Text is empty.")) + "</h4>", false);
     return;
   }
 
@@ -233,16 +233,16 @@ void KeyServerImportDialog::slotSearchFinished() {
     qDebug() << "Error From Reply" << reply->errorString();
     switch (error) {
       case QNetworkReply::ContentNotFoundError:
-        setMessage(tr("Not Key Found"), true);
+        setMessage(_("Not Key Found"), true);
         break;
       case QNetworkReply::TimeoutError:
-        setMessage(tr("Timeout"), true);
+        setMessage(_("Timeout"), true);
         break;
       case QNetworkReply::HostNotFoundError:
-        setMessage(tr("Key Server Not Found"), true);
+        setMessage(_("Key Server Not Found"), true);
         break;
       default:
-        setMessage(tr("Connection Error"), true);
+        setMessage(_("Connection Error"), true);
     }
     return;
   }
@@ -250,32 +250,35 @@ void KeyServerImportDialog::slotSearchFinished() {
   if (first_line.contains("Error")) {
     QString text = QString(reply->readLine(1024));
     if (text.contains("Too many responses")) {
-      setMessage("<h4>" + tr("Too many responses from keyserver!") + "</h4>",
-                 true);
+      setMessage(
+          "<h4>" + QString(_("Too many responses from keyserver!")) + "</h4>",
+          true);
       return;
     } else if (text.contains("No keys found")) {
       // if string looks like hex string, search again with 0x prepended
       QRegExp rx("[0-9A-Fa-f]*");
       QString query = searchLineEdit->text();
       if (rx.exactMatch(query)) {
-        setMessage("<h4>" +
-                       tr("No keys found, input may be kexId, retrying search "
-                          "with 0x.") +
-                       "</h4>",
-                   true);
+        setMessage(
+            "<h4>" +
+                QString(_("No keys found, input may be kexId, retrying search "
+                          "with 0x.")) +
+                "</h4>",
+            true);
         searchLineEdit->setText(query.prepend("0x"));
         this->slotSearch();
         return;
       } else {
-        setMessage("<h4>" + tr("No keys found containing the search string!") +
-                       "</h4>",
-                   true);
+        setMessage(
+            "<h4>" + QString(_("No keys found containing the search string!")) +
+                "</h4>",
+            true);
         return;
       }
     } else if (text.contains("Insufficiently specific words")) {
-      setMessage(
-          "<h4>" + tr("Insufficiently specific search string!") + "</h4>",
-          true);
+      setMessage("<h4>" + QString(_("Insufficiently specific search string!")) +
+                     "</h4>",
+                 true);
       return;
     } else {
       setMessage(text, true);
@@ -306,11 +309,11 @@ void KeyServerImportDialog::slotSearchFinished() {
           }
           if (flags.contains("r")) {
             keysTable->setItem(row, 3,
-                               new QTableWidgetItem(QString(tr("revoked"))));
+                               new QTableWidgetItem(QString(_("revoked"))));
           }
           if (flags.contains("d")) {
             keysTable->setItem(row, 3,
-                               new QTableWidgetItem(QString(tr("disabled"))));
+                               new QTableWidgetItem(QString(_("disabled"))));
           }
         }
 
@@ -350,9 +353,12 @@ void KeyServerImportDialog::slotSearchFinished() {
           }
         }
       }
-      setMessage(tr("<h4>%1 keys found. Double click a key to import it.</h4>")
-                     .arg(row),
-                 false);
+      setMessage(
+          QString("<h4>") +
+              QString(_("%1 keys found. Double click a key to import it."))
+                  .arg(row) +
+              "</h4>",
+          false);
     }
     keysTable->resizeColumnsToContents();
     importButton->setDisabled(keysTable->size().isEmpty());
@@ -424,16 +430,16 @@ void KeyServerImportDialog::slotImportFinished() {
     qDebug() << "Error From Reply" << reply->errorString();
     switch (error) {
       case QNetworkReply::ContentNotFoundError:
-        setMessage(tr("Key Not Found"), true);
+        setMessage(_("Key Not Found"), true);
         break;
       case QNetworkReply::TimeoutError:
-        setMessage(tr("Timeout"), true);
+        setMessage(_("Timeout"), true);
         break;
       case QNetworkReply::HostNotFoundError:
-        setMessage(tr("Key Server Not Found"), true);
+        setMessage(_("Key Server Not Found"), true);
         break;
       default:
-        setMessage(tr("Connection Error"), true);
+        setMessage(_("Connection Error"), true);
     }
     if (mAutomatic) {
       setWindowFlags(Qt::Window | Qt::WindowTitleHint |
@@ -454,9 +460,9 @@ void KeyServerImportDialog::slotImportFinished() {
   this->importKeys(std::make_unique<ByteArray>(key.constData(), key.length()));
 
   if (mAutomatic) {
-    setMessage(tr("<h4>Key Updated</h4>"), false);
+    setMessage(QString("<h4>") + _("Key Updated") + "</h4>", false);
   } else {
-    setMessage(tr("<h4>Key Imported</h4>"), false);
+    setMessage(QString("<h4>") + _("Key Imported") + "</h4>", false);
   }
 }
 
@@ -518,7 +524,7 @@ KeyServerImportDialog::KeyServerImportDialog(QWidget* parent)
   mainLayout->addLayout(messageLayout, 0, 0, 1, 3);
 
   this->setLayout(mainLayout);
-  this->setWindowTitle(tr("Upload Keys from Keyserver"));
+  this->setWindowTitle(_("Upload Keys from Keyserver"));
   this->setFixedSize(200, 42);
   this->setModal(true);
 }
diff --git a/src/ui/KeyServerImportDialog.h b/src/ui/KeyServerImportDialog.h
index f768afa7..0fb7dbf1 100644
--- a/src/ui/KeyServerImportDialog.h
+++ b/src/ui/KeyServerImportDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/KeyUploadDialog.cpp b/src/ui/KeyUploadDialog.cpp
index da905e8e..e8c37c5b 100644
--- a/src/ui/KeyUploadDialog.cpp
+++ b/src/ui/KeyUploadDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -50,7 +50,7 @@ KeyUploadDialog::KeyUploadDialog(const KeyIdArgsListPtr& keys_ids,
   this->setLayout(layout);
 
   this->setModal(true);
-  this->setWindowTitle(tr("Uploading Public Key"));
+  this->setWindowTitle(_("Uploading Public Key"));
   this->setFixedSize(240, 42);
 }
 
@@ -116,16 +116,16 @@ void KeyUploadDialog::slotUploadFinished() {
     QString message;
     switch (error) {
       case QNetworkReply::ContentNotFoundError:
-        message = tr("Key Not Found");
+        message = _("Key Not Found");
         break;
       case QNetworkReply::TimeoutError:
-        message = tr("Timeout");
+        message = _("Timeout");
         break;
       case QNetworkReply::HostNotFoundError:
-        message = tr("Key Server Not Found");
+        message = _("Key Server Not Found");
         break;
       default:
-        message = tr("Connection Error");
+        message = _("Connection Error");
     }
     QMessageBox::critical(this, "Upload Failed", message);
     return;
diff --git a/src/ui/KeyUploadDialog.h b/src/ui/KeyUploadDialog.h
index bf7533cb..b607c321 100644
--- a/src/ui/KeyUploadDialog.h
+++ b/src/ui/KeyUploadDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/MainWindow.cpp b/src/ui/MainWindow.cpp
index b986782b..cc04f246 100644
--- a/src/ui/MainWindow.cpp
+++ b/src/ui/MainWindow.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -32,7 +32,7 @@ namespace GpgFrontend::UI {
 MainWindow::MainWindow() {
   networkAccessManager = new QNetworkAccessManager(this);
 
-  auto waitingDialog = new WaitingDialog(tr("Loading Gnupg"), this);
+  auto waitingDialog = new WaitingDialog(_("Loading Gnupg"), this);
 
   QString baseUrl =
       "https://api.github.com/repos/saturneric/gpgfrontend/releases/latest";
@@ -57,9 +57,9 @@ MainWindow::MainWindow() {
   // Check Context Status
   if (!GpgContext::GetInstance().good()) {
     QMessageBox::critical(
-        nullptr, tr("ENV Loading Failed"),
-        tr("Gnupg is not installed correctly, please follow the ReadME "
-           "instructions to install gnupg and then open GPGFrontend."));
+        nullptr, _("ENV Loading Failed"),
+        _("Gnupg is not installed correctly, please follow the ReadME "
+          "instructions to install gnupg and then open GpgFrontend."));
     QCoreApplication::quit();
     exit(0);
   }
diff --git a/src/ui/MainWindow.h b/src/ui/MainWindow.h
index 095bc974..82acee63 100644
--- a/src/ui/MainWindow.h
+++ b/src/ui/MainWindow.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -230,11 +230,11 @@ class MainWindow : public QMainWindow {
    */
   void slotOpenSettingsDialog();
 
-//  /**
-//   * @details Show a warn message in status bar, if there are files in
-//   * attachment folder.
-//   */
-//  void slotCheckAttachmentFolder();
+  //  /**
+  //   * @details Show a warn message in status bar, if there are files in
+  //   * attachment folder.
+  //   */
+  //  void slotCheckAttachmentFolder();
 
   /**
    * @details Replace double linebreaks by single linebreaks in currently active
diff --git a/src/ui/QuitDialog.cpp b/src/ui/QuitDialog.cpp
index f6b3f196..a5ed7c3f 100755
--- a/src/ui/QuitDialog.cpp
+++ b/src/ui/QuitDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -24,11 +24,13 @@
 
 #include "ui/QuitDialog.h"
 
+#include <boost/format.hpp>
+
 namespace GpgFrontend::UI {
 
 QuitDialog::QuitDialog(QWidget* parent, const QHash<int, QString>& unsavedDocs)
     : QDialog(parent) {
-  setWindowTitle(tr("Unsaved Files"));
+  setWindowTitle(_("Unsaved Files"));
   setModal(true);
   discarded = false;
 
@@ -75,10 +77,12 @@ QuitDialog::QuitDialog(QWidget* parent, const QHash<int, QString>& unsavedDocs)
   pixmap = pixmap.scaled(50, 50, Qt::KeepAspectRatio, Qt::SmoothTransformation);
   auto* warn_icon = new QLabel();
   warn_icon->setPixmap(pixmap);
-  auto* warn_label =
-      new QLabel(tr("%1 files contain unsaved information.<br/>Save the "
-                    "changes before closing?")
-                     .arg(row));
+
+  const auto info =
+      boost::format(_("%1% files contain unsaved information.<br/>Save the "
+                      "changes before closing?")) %
+      std::to_string(row);
+  auto* warn_label = new QLabel(QString::fromStdString(info.str()));
   auto* warnBoxLayout = new QHBoxLayout();
   warnBoxLayout->addWidget(warn_icon);
   warnBoxLayout->addWidget(warn_label);
@@ -89,10 +93,10 @@ QuitDialog::QuitDialog(QWidget* parent, const QHash<int, QString>& unsavedDocs)
   /*
    *  Two labels on top and under the filelist
    */
-  auto* checkLabel = new QLabel(tr("Check the files you want to save:"));
-  auto* note_label =
-      new QLabel(tr("<b>Note:</b> If you don't save these files, all changes "
-                    "are lost.<br/>"));
+  auto* checkLabel = new QLabel(_("Check the files you want to save:"));
+  auto* note_label = new QLabel(
+      "<b>" + QString(_("Note")) + ":</b>" +
+      _("If you don't save these files, all changes are lost.") + "<br/>");
 
   /*
    *  Buttonbox
@@ -122,9 +126,7 @@ void QuitDialog::slotMyDiscard() {
   reject();
 }
 
-bool QuitDialog::isDiscarded() const {
-  return discarded;
-}
+bool QuitDialog::isDiscarded() const { return discarded; }
 
 QList<int> QuitDialog::getTabIdsToSave() {
   QList<int> tabIdsToSave;
diff --git a/src/ui/QuitDialog.h b/src/ui/QuitDialog.h
index 86616667..2b1dd37f 100755
--- a/src/ui/QuitDialog.h
+++ b/src/ui/QuitDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/ShowCopyDialog.cpp b/src/ui/ShowCopyDialog.cpp
index 98a1df3c..0503e079 100644
--- a/src/ui/ShowCopyDialog.cpp
+++ b/src/ui/ShowCopyDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -26,8 +26,7 @@
 
 namespace GpgFrontend::UI {
 
-ShowCopyDialog::ShowCopyDialog(const QString& text,
-                               const QString& info,
+ShowCopyDialog::ShowCopyDialog(const QString& text, const QString& info,
                                QWidget* parent)
     : QDialog(parent) {
   textEdit = new QTextEdit();
diff --git a/src/ui/ShowCopyDialog.h b/src/ui/ShowCopyDialog.h
index 82deedee..fefef7ab 100644
--- a/src/ui/ShowCopyDialog.h
+++ b/src/ui/ShowCopyDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -32,8 +32,7 @@ namespace GpgFrontend::UI {
 class ShowCopyDialog : public QDialog {
   Q_OBJECT
  public:
-  explicit ShowCopyDialog(const QString& text,
-                          const QString& info = "",
+  explicit ShowCopyDialog(const QString& text, const QString& info = "",
                           QWidget* parent = nullptr);
 
  private slots:
diff --git a/src/ui/SignalStation.cpp b/src/ui/SignalStation.cpp
index ad5c0b53..fff2971a 100644
--- a/src/ui/SignalStation.cpp
+++ b/src/ui/SignalStation.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/SignalStation.h b/src/ui/SignalStation.h
index 92211aa2..38e55d9f 100644
--- a/src/ui/SignalStation.h
+++ b/src/ui/SignalStation.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/UserInterfaceUtils.cpp b/src/ui/UserInterfaceUtils.cpp
index 4dd571a1..f8658a78 100644
--- a/src/ui/UserInterfaceUtils.cpp
+++ b/src/ui/UserInterfaceUtils.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -53,7 +53,6 @@ void process_result_analyse(TextEdit* edit, InfoBoardWidget* info_board,
 void process_result_analyse(TextEdit* edit, InfoBoardWidget* info_board,
                             const ResultAnalyse& result_analyse_a,
                             const ResultAnalyse& result_analyse_b) {
-
   LOG(INFO) << "process_result_analyse Started";
 
   info_board->associateTabWidget(edit->tabWidget);
diff --git a/src/ui/UserInterfaceUtils.h b/src/ui/UserInterfaceUtils.h
index 979cebe6..ec439461 100644
--- a/src/ui/UserInterfaceUtils.h
+++ b/src/ui/UserInterfaceUtils.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/VerifyDetailsDialog.cpp b/src/ui/VerifyDetailsDialog.cpp
index f06c31a4..1ad9d996 100644
--- a/src/ui/VerifyDetailsDialog.cpp
+++ b/src/ui/VerifyDetailsDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -24,17 +24,17 @@
 
 #include "ui/VerifyDetailsDialog.h"
 
+#include <boost/format.hpp>
+
 namespace GpgFrontend::UI {
 
-VerifyDetailsDialog::VerifyDetailsDialog(QWidget* parent,
-                                         KeyList* keyList,
-                                         GpgError error,
-                                         GpgVerifyResult result)
+VerifyDetailsDialog::VerifyDetailsDialog(QWidget* parent, KeyList* keyList,
+                                         GpgError error, GpgVerifyResult result)
     : QDialog(parent),
       mKeyList(keyList),
       mResult(std::move(result)),
       error(error) {
-  this->setWindowTitle(tr("Signature Details"));
+  this->setWindowTitle(_("Signature Details"));
 
   mainLayout = new QHBoxLayout();
   this->setLayout(mainLayout);
@@ -53,12 +53,13 @@ void VerifyDetailsDialog::slotRefresh() {
   buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
   connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()));
 
-  mVboxLayout->addWidget(new QLabel(tr("Status: ") + gpgme_strerror(error)));
+  mVboxLayout->addWidget(new QLabel(QString::fromStdString(
+      std::string(_("Status")) + ": " + gpgme_strerror(error))));
 
   auto sign = mResult->signatures;
 
   if (sign == nullptr) {
-    mVboxLayout->addWidget(new QLabel(tr("No valid input found")));
+    mVboxLayout->addWidget(new QLabel(_("No valid input found")));
     mVboxLayout->addWidget(buttonBox);
     return;
   }
@@ -69,15 +70,19 @@ void VerifyDetailsDialog::slotRefresh() {
 
   // Set the title widget depending on sign status
   if (gpg_err_code(sign->status) == GPG_ERR_BAD_SIGNATURE) {
-    mVboxLayout->addWidget(new QLabel(tr("Error Validating signature")));
+    mVboxLayout->addWidget(new QLabel(_("Error Validating signature")));
   } else if (mInputSignature != nullptr) {
-    mVboxLayout->addWidget(
-        new QLabel(tr("File was signed on %1 <br/> It Contains:<br/><br/>")
-                       .arg(QLocale::system().toString(timestamp))));
+    const auto info = (boost::format(_("File was signed on %1%")) %
+                       QLocale::system().toString(timestamp).toStdString())
+                          .str() +
+                      "<br/>" + _("It Contains") + ": " + "<br/><br/>";
+    mVboxLayout->addWidget(new QLabel(info.c_str()));
   } else {
-    mVboxLayout->addWidget(
-        new QLabel(tr("Signed on %1 <br/> It Contains:<br /><br/>")
-                       .arg(QLocale::system().toString(timestamp))));
+    const auto info = (boost::format(_("Signed on %1%")) %
+                       QLocale::system().toString(timestamp).toStdString())
+                          .str() +
+                      "<br/>" + _("It Contains") + ": " + "<br/><br/>";
+    mVboxLayout->addWidget(new QLabel(info.c_str()));
   }
   // Add information box for every single key
   while (sign) {
diff --git a/src/ui/VerifyDetailsDialog.h b/src/ui/VerifyDetailsDialog.h
index 3d201194..3de4a56f 100644
--- a/src/ui/VerifyDetailsDialog.h
+++ b/src/ui/VerifyDetailsDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -34,10 +34,8 @@ namespace GpgFrontend::UI {
 class VerifyDetailsDialog : public QDialog {
   Q_OBJECT
  public:
-  explicit VerifyDetailsDialog(QWidget* parent,
-                               KeyList* keyList,
-                               GpgError error,
-                               GpgVerifyResult result);
+  explicit VerifyDetailsDialog(QWidget* parent, KeyList* keyList,
+                               GpgError error, GpgVerifyResult result);
 
  private slots:
 
diff --git a/src/ui/WaitingDialog.cpp b/src/ui/WaitingDialog.cpp
index 44727193..d9aab23b 100644
--- a/src/ui/WaitingDialog.cpp
+++ b/src/ui/WaitingDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/WaitingDialog.h b/src/ui/WaitingDialog.h
index 342360fd..798c2a3c 100644
--- a/src/ui/WaitingDialog.h
+++ b/src/ui/WaitingDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/Wizard.cpp b/src/ui/Wizard.cpp
index 2f050e80..c2733f0c 100644
--- a/src/ui/Wizard.cpp
+++ b/src/ui/Wizard.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -40,7 +40,7 @@ Wizard::Wizard(KeyMgmt* keyMgmt, QWidget* parent)
 #ifndef Q_WS_MAC
   setWizardStyle(ModernStyle);
 #endif
-  setWindowTitle(tr("First Start Wizard"));
+  setWindowTitle(_("First Start Wizard"));
 
   // http://www.flickr.com/photos/laureenp/6141822934/
   setPixmap(QWizard::WatermarkPixmap, QPixmap(":/keys2.jpg"));
@@ -67,19 +67,19 @@ IntroPage::IntroPage(QWidget* parent)
       appPath(qApp->applicationDirPath()),
       settings(RESOURCE_DIR(appPath) + "/conf/gpgfrontend.ini",
                QSettings::IniFormat) {
-  setTitle(tr("Getting Started..."));
-  setSubTitle(tr("... with GPGFrontend"));
+  setTitle(_("Getting Started..."));
+  setSubTitle(_("... with GpgFrontend"));
 
   auto* topLabel = new QLabel(
-      tr("Welcome to use GPGFrontend for decrypting and signing text or "
-         "file!") +
+      QString(_("Welcome to use GpgFrontend for decrypting and signing text or "
+                "file!")) +
       " <br><br><a href='https://gpgfrontend.pub'>GpgFrontend</a> " +
-      tr("is a Powerful, Easy-to-Use, Compact, Cross-Platform, and "
-         "Installation-Free OpenPGP Crypto Tool.") +
-      tr("For brief information have a look at the") +
+      _("is a Powerful, Easy-to-Use, Compact, Cross-Platform, and "
+        "Installation-Free OpenPGP Crypto Tool.") +
+      _("For brief information have a look at the") +
       " <a href='https://gpgfrontend.pub/index.html#/overview'>" +
-      tr("Overview") + "</a> (" +
-      tr("by clicking the link, the page will open in the web browser") +
+      _("Overview") + "</a> (" +
+      _("by clicking the link, the page will open in the web browser") +
       "). <br>");
   topLabel->setTextFormat(Qt::RichText);
   topLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
@@ -87,7 +87,7 @@ IntroPage::IntroPage(QWidget* parent)
   topLabel->setWordWrap(true);
 
   // QComboBox for language selection
-  auto* langLabel = new QLabel(tr("Choose a Language"));
+  auto* langLabel = new QLabel(_("Choose a Language"));
   langLabel->setWordWrap(true);
 
   languages = SettingsDialog::listLanguages();
@@ -99,7 +99,7 @@ IntroPage::IntroPage(QWidget* parent)
   // selected entry from config
   QString langKey = settings.value("int/lang").toString();
   QString langValue = languages.value(langKey);
-  if (langKey != "") {
+  if (!langKey.isEmpty()) {
     langSelectBox->setCurrentIndex(langSelectBox->findText(langValue));
   }
 
@@ -120,35 +120,35 @@ void IntroPage::slotLangChange(const QString& lang) {
   qApp->exit(RESTART_CODE);
 }
 
-int IntroPage::nextId() const {
-  return Wizard::Page_Choose;
-}
+int IntroPage::nextId() const { return Wizard::Page_Choose; }
 
 ChoosePage::ChoosePage(QWidget* parent) : QWizardPage(parent) {
-  setTitle(tr("Choose your action..."));
-  setSubTitle(tr("...by clicking on the appropriate link."));
+  setTitle(_("Choose your action..."));
+  setSubTitle(_("...by clicking on the appropriate link."));
 
   auto* keygenLabel = new QLabel(
-      tr("If you have never used GPGFrontend before and also don't own a gpg "
-         "key yet you "
-         "may possibly want to read how to") +
+      QString(_(
+          "If you have never used GpgFrontend before and also don't own a gpg "
+          "key yet you "
+          "may possibly want to read how to")) +
       " <a href=\"https://gpgfrontend.pub/index.html#/manual/generate-key\">" +
-      tr("Generate Key") + "</a><hr>");
+      _("Generate Key") + "</a><hr>");
   keygenLabel->setTextFormat(Qt::RichText);
   keygenLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
   keygenLabel->setOpenExternalLinks(true);
   keygenLabel->setWordWrap(true);
 
   auto* encrDecyTextLabel = new QLabel(
-      tr("If you want to learn how to encrypt, decrypt, sign and verify text, "
-         "you can read ") +
+      QString(_(
+          "If you want to learn how to encrypt, decrypt, sign and verify text, "
+          "you can read ")) +
       "<a "
       "href=\"https://gpgfrontend.pub/index.html#/manual/"
       "encrypt-decrypt-text\">" +
-      tr("Encrypt & Decrypt Text") + "</a> " + tr("or") +
+      _("Encrypt & Decrypt Text") + "</a> " + _("or") +
       " <a "
       "href=\"https://gpgfrontend.pub/index.html#/manual/sign-verify-text\">" +
-      tr("Sign & Verify Text") + "</a><hr>");
+      _("Sign & Verify Text") + "</a><hr>");
 
   encrDecyTextLabel->setTextFormat(Qt::RichText);
   encrDecyTextLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
@@ -156,14 +156,14 @@ ChoosePage::ChoosePage(QWidget* parent) : QWizardPage(parent) {
   encrDecyTextLabel->setWordWrap(true);
 
   auto* signVerifyTextLabel = new QLabel(
-      tr("If you want to operate file, you can read ") +
+      QString(_("If you want to operate file, you can read ")) +
       "<a "
       "href=\"https://gpgfrontend.pub/index.html#/manual/"
       "encrypt-decrypt-file\">" +
-      tr("Encrypt & Sign File") + "</a> " + tr("or") +
+      _("Encrypt & Sign File") + "</a> " + _("or") +
       " <a "
       "href=\"https://gpgfrontend.pub/index.html#/manual/sign-verify-file\">" +
-      tr("Sign & Verify File") + "</a><hr>");
+      _("Sign & Verify File") + "</a><hr>");
   signVerifyTextLabel->setTextFormat(Qt::RichText);
   signVerifyTextLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
   signVerifyTextLabel->setOpenExternalLinks(true);
@@ -177,9 +177,7 @@ ChoosePage::ChoosePage(QWidget* parent) : QWizardPage(parent) {
   nextPage = Wizard::Page_Conclusion;
 }
 
-int ChoosePage::nextId() const {
-  return nextPage;
-}
+int ChoosePage::nextId() const { return nextPage; }
 
 void ChoosePage::slotJumpPage(const QString& page) {
   QMetaObject qmo = Wizard::staticMetaObject;
@@ -191,22 +189,22 @@ void ChoosePage::slotJumpPage(const QString& page) {
 }
 
 KeyGenPage::KeyGenPage(QWidget* parent) : QWizardPage(parent) {
-  setTitle(tr("Create a keypair..."));
-  setSubTitle(tr("...for decrypting and signing messages"));
+  setTitle(_("Create a keypair..."));
+  setSubTitle(_("...for decrypting and signing messages"));
   auto* topLabel = new QLabel(
-      tr("You should create a new keypair."
-         "The pair consists of a public and a private key.<br>"
-         "Other users can use the public key to encrypt messages for you "
-         "and verify messages signed by you."
-         "You can use the private key to decrypt and sign messages.<br>"
-         "For more information have a look at the offline tutorial (which then "
-         "is shown in the main window):"));
+      _("You should create a new keypair."
+        "The pair consists of a public and a private key.<br>"
+        "Other users can use the public key to encrypt messages for you "
+        "and verify messages signed by you."
+        "You can use the private key to decrypt and sign messages.<br>"
+        "For more information have a look at the offline tutorial (which then "
+        "is shown in the main window):"));
   topLabel->setWordWrap(true);
   auto* linkLabel = new QLabel(
       "<a href="
       "docu_keygen.html#content"
       ">" +
-      tr("Offline tutorial") + "</a>");
+      QString(_("Offline tutorial")) + "</a>");
   // linkLabel->setOpenExternalLinks(true);
 
   // connect(linkLabel, SIGNAL(linkActivated(QString)),
@@ -214,7 +212,7 @@ KeyGenPage::KeyGenPage(QWidget* parent) : QWizardPage(parent) {
 
   auto* createKeyButtonBox = new QWidget(this);
   auto* createKeyButtonBoxLayout = new QHBoxLayout(createKeyButtonBox);
-  auto* createKeyButton = new QPushButton(tr("Create New Key"));
+  auto* createKeyButton = new QPushButton(_("Create New Key"));
   createKeyButtonBoxLayout->addWidget(createKeyButton);
   createKeyButtonBoxLayout->addStretch(1);
   auto* layout = new QVBoxLayout();
@@ -227,9 +225,7 @@ KeyGenPage::KeyGenPage(QWidget* parent) : QWizardPage(parent) {
   setLayout(layout);
 }
 
-int KeyGenPage::nextId() const {
-  return Wizard::Page_Conclusion;
-}
+int KeyGenPage::nextId() const { return Wizard::Page_Conclusion; }
 
 void KeyGenPage::slotGenerateKeyDialog() {
   qDebug() << "Try Opening KeyGenDialog";
@@ -238,27 +234,28 @@ void KeyGenPage::slotGenerateKeyDialog() {
 }
 
 ConclusionPage::ConclusionPage(QWidget* parent) : QWizardPage(parent) {
-  setTitle(tr("Ready."));
-  setSubTitle(tr("Have fun with GPGFrontend!"));
+  setTitle(_("Ready."));
+  setSubTitle(_("Have fun with GpgFrontend!"));
 
   auto* bottomLabel =
-      new QLabel(tr("You are ready to use GPGFrontend now.<br><br>") +
+      new QLabel(QString(_("You are ready to use GpgFrontend now.<br><br>")) +
                  "<a "
                  "href=\"https://saturneric.github.io/GpgFrontend/index.html#/"
                  "overview\">" +
-                 tr("The Online Document") + "</a>" +
-                 tr(" will get you started with GPGFrontend. It will open in "
-                    "the main window.<br>"));
+                 _("The Online Document") + "</a>" +
+                 _(" will get you started with GpgFrontend. It will open in "
+                   "the main window.") +
+                 "<br>");
 
   bottomLabel->setTextFormat(Qt::RichText);
   bottomLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
   bottomLabel->setOpenExternalLinks(true);
   bottomLabel->setWordWrap(true);
 
-  openHelpCheckBox = new QCheckBox(tr("Open offline help."));
+  openHelpCheckBox = new QCheckBox(_("Open offline help."));
   openHelpCheckBox->setChecked(Qt::Checked);
 
-  dontShowWizardCheckBox = new QCheckBox(tr("Dont show the wizard again."));
+  dontShowWizardCheckBox = new QCheckBox(_("Dont show the wizard again."));
   dontShowWizardCheckBox->setChecked(Qt::Checked);
 
   registerField("showWizard", dontShowWizardCheckBox);
@@ -272,8 +269,6 @@ ConclusionPage::ConclusionPage(QWidget* parent) : QWizardPage(parent) {
   setVisible(true);
 }
 
-int ConclusionPage::nextId() const {
-  return -1;
-}
+int ConclusionPage::nextId() const { return -1; }
 
 }  // namespace GpgFrontend::UI
diff --git a/src/ui/Wizard.h b/src/ui/Wizard.h
index 41b1a745..e1e9092d 100644
--- a/src/ui/Wizard.h
+++ b/src/ui/Wizard.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/help/AboutDialog.cpp b/src/ui/help/AboutDialog.cpp
index 4c6c2348..cd0010a6 100644
--- a/src/ui/help/AboutDialog.cpp
+++ b/src/ui/help/AboutDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -23,8 +23,8 @@
  */
 
 #include "ui/help/AboutDialog.h"
-#include "GpgFrontendBuildInfo.h"
 
+#include "GpgFrontendBuildInfo.h"
 #include "rapidjson/document.h"
 #include "rapidjson/writer.h"
 
@@ -33,16 +33,16 @@ using namespace rapidjson;
 namespace GpgFrontend::UI {
 
 AboutDialog::AboutDialog(int defaultIndex, QWidget* parent) : QDialog(parent) {
-  this->setWindowTitle(tr("About ") + qApp->applicationName());
+  this->setWindowTitle(QString(_("About")) + " " + qApp->applicationName());
 
   auto* tabWidget = new QTabWidget;
   auto* infoTab = new InfoTab();
   auto* translatorsTab = new TranslatorsTab();
   updateTab = new UpdateTab();
 
-  tabWidget->addTab(infoTab, tr("General"));
-  tabWidget->addTab(translatorsTab, tr("Translators"));
-  tabWidget->addTab(updateTab, tr("Update"));
+  tabWidget->addTab(infoTab, _("General"));
+  tabWidget->addTab(translatorsTab, _("Translators"));
+  tabWidget->addTab(updateTab, _("Update"));
 
   connect(tabWidget, &QTabWidget::currentChanged, this,
           [&](int index) { qDebug() << "Current Index" << index; });
@@ -73,20 +73,21 @@ InfoTab::InfoTab(QWidget* parent) : QWidget(parent) {
       "<center><h2>" + qApp->applicationName() + "</h2></center>" +
       "<center><b>" + qApp->applicationVersion() + "</b></center>" +
       "<center>" + GIT_VERSION + "</center>" +
-      tr("<br><center>GPGFrontend is an easy-to-use, compact, cross-platform, "
-         "<br>"
-         "and installation-free gpg front-end tool.<br>"
-         "It visualizes most of the common operations of gpg commands.<br>"
-         "It's licensed under the GPL v3<br><br>"
-         "<b>Developer:</b><br>"
-         "Saturneric<br><br>"
-         "If you have any questions or suggestions, raise an issue<br/>"
-         "at <a href=\"https://github.com/saturneric/GpgFrontend\">GitHub</a> "
-         "or send a mail to my mailing list at <a "
-         "href=\"mailto:[email protected]\">[email protected]</a>.") +
-      tr("<br><br> Built with Qt ") + qVersion() + tr(" and GPGME ") +
-      GpgFrontend::GpgContext::getGpgmeVersion().c_str() + tr("<br>Built at ") +
-      BUILD_TIMESTAMP + "</center>");
+      _("<br><center>GpgFrontend is an easy-to-use, compact, cross-platform, "
+        "<br>"
+        "and installation-free gpg front-end tool.<br>"
+        "It visualizes most of the common operations of gpg commands.<br>"
+        "It's licensed under the GPL v3<br><br>"
+        "<b>Developer:</b><br>"
+        "Saturneric<br><br>"
+        "If you have any questions or suggestions, raise an issue<br/>"
+        "at <a href=\"https://github.com/saturneric/GpgFrontend\">GitHub</a> "
+        "or send a mail to my mailing list at <a "
+        "href=\"mailto:[email protected]\">[email protected]</a>.") +
+      "<br><br> " + _("Built with Qt") + " " + qVersion() + " " +
+      _("and GPGME") + " " +
+      GpgFrontend::GpgContext::getGpgmeVersion().c_str() + "<br>" +
+      _("Built at") + " " + BUILD_TIMESTAMP + "</center>");
 
   auto* layout = new QGridLayout();
   auto* pixmapLabel = new QLabel();
@@ -128,18 +129,20 @@ UpdateTab::UpdateTab(QWidget* parent) {
                    QString::number(VERSION_PATCH);
 
   auto tipsLabel = new QLabel();
-  tipsLabel->setText("<center>" +
-                     tr("It is recommended that you always check the version "
-                        "of GpgFrontend and upgrade to the latest version.") +
-                     "</center><br><center>" +
-                     tr("New versions not only represent new features, but "
-                        "also often represent functional and security fixes.") +
-                     "</center>");
+  tipsLabel->setText(
+      "<center>" +
+      QString(_("It is recommended that you always check the version "
+                "of GpgFrontend and upgrade to the latest version.")) +
+      "</center><br><center>" +
+      _("New versions not only represent new features, but "
+        "also often represent functional and security fixes.") +
+      "</center>");
   tipsLabel->setWordWrap(true);
 
   currentVersionLabel = new QLabel();
-  currentVersionLabel->setText("<center>" + tr("Current Version: ") + "<b>" +
-                               currentVersion + "</b></center>");
+  currentVersionLabel->setText("<center>" + QString(_("Current Version")) +
+                               _(": ") + "<b>" + currentVersion +
+                               "</b></center>");
   currentVersionLabel->setWordWrap(true);
 
   latestVersionLabel = new QLabel();
@@ -148,13 +151,13 @@ UpdateTab::UpdateTab(QWidget* parent) {
   upgradeLabel = new QLabel();
   upgradeLabel->setText(
       "<center>" +
-      tr("The current version is inconsistent with the latest version on "
-         "github.") +
-      "</center><br><center>" +
-      tr("Please click <a "
-         "href=\"https://github.com/saturneric/GpgFrontend/releases\">here</a> "
-         "to download the latest version.") +
-      "</center>");
+      QString(
+          _("The current version is inconsistent with the latest version on "
+            "github.")) +
+      "</center><br><center>" + _("Please click") +
+      " <a "
+      "href=\"https://github.com/saturneric/GpgFrontend/releases\">here</a> " +
+      _("to download the latest version.") + "</center>");
   upgradeLabel->setWordWrap(true);
   upgradeLabel->setOpenExternalLinks(true);
   upgradeLabel->setHidden(true);
@@ -192,8 +195,7 @@ void UpdateTab::getLatestVersion() {
   request.setUrl(QUrl(baseUrl));
   QNetworkReply* replay = manager->get(request);
   auto thread = QThread::create([replay, this]() {
-    while (replay->isRunning())
-      QApplication::processEvents();
+    while (replay->isRunning()) QApplication::processEvents();
     emit replyFromUpdateServer(replay->readAll());
   });
   connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
@@ -209,8 +211,8 @@ void UpdateTab::processReplyDataFromUpdateServer(const QByteArray& data) {
   if (d.Parse(data.constData()).HasParseError() || !d.IsObject()) {
     qDebug() << "VersionCheckThread Found Network Error";
     auto latestVersion = "Unknown";
-    latestVersionLabel->setText("<center><b>" +
-                                tr("Latest Version From Github: ") +
+    latestVersionLabel->setText(QString("<center><b>") +
+                                _("Latest Version From Github") + ": " +
                                 latestVersion + "</b></center>");
     return;
   }
@@ -228,11 +230,10 @@ void UpdateTab::processReplyDataFromUpdateServer(const QByteArray& data) {
     latestVersion = "Unknown";
 
   latestVersionLabel->setText("<center><b>" +
-                              tr("Latest Version From Github: ") +
+                              QString(_("Latest Version From Github")) + ": " +
                               latestVersion + "</b></center>");
 
-  if (latestVersion > currentVersion)
-    upgradeLabel->setHidden(false);
+  if (latestVersion > currentVersion) upgradeLabel->setHidden(false);
 }
 
 }  // namespace GpgFrontend::UI
diff --git a/src/ui/help/AboutDialog.h b/src/ui/help/AboutDialog.h
index 3b7d42c8..a7d7099b 100644
--- a/src/ui/help/AboutDialog.h
+++ b/src/ui/help/AboutDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/help/VersionCheckThread.cpp b/src/ui/help/VersionCheckThread.cpp
index 3204dadf..a35583f4 100644
--- a/src/ui/help/VersionCheckThread.cpp
+++ b/src/ui/help/VersionCheckThread.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -23,6 +23,7 @@
  */
 
 #include "ui/help/VersionCheckThread.h"
+
 #include "GpgFrontendBuildInfo.h"
 #include "rapidjson/document.h"
 
diff --git a/src/ui/help/VersionCheckThread.h b/src/ui/help/VersionCheckThread.h
index eedbfa5b..181ee947 100644
--- a/src/ui/help/VersionCheckThread.h
+++ b/src/ui/help/VersionCheckThread.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keygen/KeygenDialog.cpp b/src/ui/keygen/KeygenDialog.cpp
index a8bc6935..382be5cb 100644
--- a/src/ui/keygen/KeygenDialog.cpp
+++ b/src/ui/keygen/KeygenDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -34,7 +34,7 @@ KeyGenDialog::KeyGenDialog(QWidget* parent) : QDialog(parent) {
   buttonBox =
       new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
 
-  this->setWindowTitle(tr("Generate Key"));
+  this->setWindowTitle(_("Generate Key"));
   this->setModal(true);
 
   connect(this, SIGNAL(KeyGenerated()), SignalStation::GetInstance(),
@@ -66,16 +66,17 @@ void KeyGenDialog::generateKeyDialog() {
 }
 
 void KeyGenDialog::slotKeyGenAccept() {
-  QString errorString = "";
+  std::stringstream error_stream;
 
   /**
    * check for errors in keygen dialog input
    */
   if ((nameEdit->text()).size() < 5) {
-    errorString.append(tr("  Name must contain at least five characters.  \n"));
+    error_stream << "  " << _("Name must contain at least five characters.")
+                 << std::endl;
   }
   if (emailEdit->text().isEmpty() || !check_email_address(emailEdit->text())) {
-    errorString.append(tr("  Please give a email address.   \n"));
+    error_stream << "  " << _("Please give a email address.") << std::endl;
   }
 
   /**
@@ -83,10 +84,13 @@ void KeyGenDialog::slotKeyGenAccept() {
    * in the future)
    */
   if (dateEdit->dateTime() > QDateTime::currentDateTime().addYears(2)) {
-    errorString.append(tr("  Expiration time no more than 2 years.  \n"));
+    error_stream << "  " << _("Expiration time no more than 2 years.")
+                 << std::endl;
   }
 
-  if (errorString.isEmpty()) {
+  auto err_string = error_stream.str();
+
+  if (err_string.empty()) {
     /**
      * create the string for key generation
      */
@@ -124,15 +128,15 @@ void KeyGenDialog::slotKeyGenAccept() {
       auto* msg_box = new QMessageBox(nullptr);
       msg_box->setAttribute(Qt::WA_DeleteOnClose);
       msg_box->setStandardButtons(QMessageBox::Ok);
-      msg_box->setWindowTitle(tr("Success"));
-      msg_box->setText(tr("The new key pair has been generated."));
+      msg_box->setWindowTitle(_("Success"));
+      msg_box->setText(_("The new key pair has been generated."));
       msg_box->setModal(false);
       msg_box->open();
 
       emit KeyGenerated();
       this->close();
     } else {
-      QMessageBox::critical(this, tr("Failure"), tr(gpgme_strerror(error)));
+      QMessageBox::critical(this, _("Failure"), _(gpgme_strerror(error)));
     }
 
   } else {
@@ -143,7 +147,7 @@ void KeyGenDialog::slotKeyGenAccept() {
     QPalette error = errorLabel->palette();
     error.setColor(QPalette::Window, "#ff8080");
     errorLabel->setPalette(error);
-    errorLabel->setText(errorString);
+    errorLabel->setText(err_string.c_str());
 
     this->show();
   }
@@ -161,18 +165,18 @@ QGroupBox* KeyGenDialog::create_key_usage_group_box() {
   auto* groupBox = new QGroupBox(this);
   auto* grid = new QGridLayout(this);
 
-  groupBox->setTitle(tr("Key Usage"));
+  groupBox->setTitle(_("Key Usage"));
 
-  auto* encrypt = new QCheckBox(tr("Encryption"), groupBox);
+  auto* encrypt = new QCheckBox(_("Encryption"), groupBox);
   encrypt->setTristate(false);
 
-  auto* sign = new QCheckBox(tr("Signing"), groupBox);
+  auto* sign = new QCheckBox(_("Signing"), groupBox);
   sign->setTristate(false);
 
-  auto* cert = new QCheckBox(tr("Certification"), groupBox);
+  auto* cert = new QCheckBox(_("Certification"), groupBox);
   cert->setTristate(false);
 
-  auto* auth = new QCheckBox(tr("Authentication"), groupBox);
+  auto* auth = new QCheckBox(_("Authentication"), groupBox);
   auth->setTristate(false);
 
   keyUsageCheckBoxes.push_back(encrypt);
@@ -317,7 +321,7 @@ bool KeyGenDialog::check_email_address(const QString& str) {
 }
 
 QGroupBox* KeyGenDialog::create_basic_info_group_box() {
-  errorLabel = new QLabel(tr(""));
+  errorLabel = new QLabel();
   nameEdit = new QLineEdit(this);
   emailEdit = new QLineEdit(this);
   commentEdit = new QLineEdit(this);
@@ -348,14 +352,14 @@ QGroupBox* KeyGenDialog::create_basic_info_group_box() {
 
   auto* vbox1 = new QGridLayout;
 
-  vbox1->addWidget(new QLabel(tr("Name:")), 0, 0);
-  vbox1->addWidget(new QLabel(tr("Email Address:")), 1, 0);
-  vbox1->addWidget(new QLabel(tr("Comment:")), 2, 0);
-  vbox1->addWidget(new QLabel(tr("Expiration Date:")), 3, 0);
-  vbox1->addWidget(new QLabel(tr("Never Expire")), 3, 3);
-  vbox1->addWidget(new QLabel(tr("KeySize (in Bit):")), 4, 0);
-  vbox1->addWidget(new QLabel(tr("Key Type:")), 5, 0);
-  vbox1->addWidget(new QLabel(tr("Non Pass Phrase")), 6, 0);
+  vbox1->addWidget(new QLabel(QString(_("Name")) + ": "), 0, 0);
+  vbox1->addWidget(new QLabel(QString(_("Email Address")) + ": "), 1, 0);
+  vbox1->addWidget(new QLabel(QString(_("Comment")) + ": "), 2, 0);
+  vbox1->addWidget(new QLabel(QString(_("Expiration Date")) + ": "), 3, 0);
+  vbox1->addWidget(new QLabel(QString(_("Never Expire")) + ": "), 3, 3);
+  vbox1->addWidget(new QLabel(QString(_("KeySize (in Bit)")) + ": "), 4, 0);
+  vbox1->addWidget(new QLabel(QString(_("Key Type")) + ": "), 5, 0);
+  vbox1->addWidget(new QLabel(QString(_("Non Pass Phrase")) + ": "), 6, 0);
 
   vbox1->addWidget(nameEdit, 0, 1, 1, 3);
   vbox1->addWidget(emailEdit, 1, 1, 1, 3);
@@ -368,7 +372,7 @@ QGroupBox* KeyGenDialog::create_basic_info_group_box() {
 
   auto basicInfoGroupBox = new QGroupBox();
   basicInfoGroupBox->setLayout(vbox1);
-  basicInfoGroupBox->setTitle(tr("Basic Information"));
+  basicInfoGroupBox->setTitle(_("Basic Information"));
 
   return basicInfoGroupBox;
 }
diff --git a/src/ui/keygen/KeygenDialog.h b/src/ui/keygen/KeygenDialog.h
index 60a34a90..c16a2e76 100644
--- a/src/ui/keygen/KeygenDialog.h
+++ b/src/ui/keygen/KeygenDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -44,8 +44,8 @@ class KeyGenDialog : public QDialog {
    */
   explicit KeyGenDialog(QWidget* parent = nullptr);
 
-  signals:
-   void KeyGenerated();
+ signals:
+  void KeyGenerated();
 
  private:
   QGroupBox* create_key_usage_group_box();
@@ -54,7 +54,7 @@ class KeyGenDialog : public QDialog {
 
   QRegularExpression re_email{
       R"((?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\]))"};
-  
+
   QStringList errorMessages; /** List of errors occuring when checking entries
                                 of lineedits */
   std::unique_ptr<GenKeyInfo> genKeyInfo = std::make_unique<GenKeyInfo>();
diff --git a/src/ui/keygen/SubkeyGenerateDialog.cpp b/src/ui/keygen/SubkeyGenerateDialog.cpp
index 41bc36c9..593b1cae 100644
--- a/src/ui/keygen/SubkeyGenerateDialog.cpp
+++ b/src/ui/keygen/SubkeyGenerateDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -50,7 +50,7 @@ SubkeyGenerateDialog::SubkeyGenerateDialog(const KeyId& key_id, QWidget* parent)
   vbox2->addWidget(errorLabel);
   vbox2->addWidget(buttonBox);
 
-  this->setWindowTitle(tr("Generate New Subkey"));
+  this->setWindowTitle(_("Generate New Subkey"));
   this->setLayout(vbox2);
   this->setModal(true);
 
@@ -67,16 +67,16 @@ QGroupBox* SubkeyGenerateDialog::create_key_usage_group_box() {
 
   groupBox->setTitle("Key Usage");
 
-  auto* encrypt = new QCheckBox(tr("Encryption"), groupBox);
+  auto* encrypt = new QCheckBox(_("Encryption"), groupBox);
   encrypt->setTristate(false);
 
-  auto* sign = new QCheckBox(tr("Signing"), groupBox);
+  auto* sign = new QCheckBox(_("Signing"), groupBox);
   sign->setTristate(false);
 
-  auto* cert = new QCheckBox(tr("Certification"), groupBox);
+  auto* cert = new QCheckBox(_("Certification"), groupBox);
   cert->setTristate(false);
 
-  auto* auth = new QCheckBox(tr("Authentication"), groupBox);
+  auto* auth = new QCheckBox(_("Authentication"), groupBox);
   auth->setTristate(false);
 
   keyUsageCheckBoxes.push_back(encrypt);
@@ -95,7 +95,7 @@ QGroupBox* SubkeyGenerateDialog::create_key_usage_group_box() {
 }
 
 QGroupBox* SubkeyGenerateDialog::create_basic_info_group_box() {
-  errorLabel = new QLabel(tr(""));
+  errorLabel = new QLabel();
   keySizeSpinBox = new QSpinBox(this);
   keyTypeComboBox = new QComboBox(this);
 
@@ -120,10 +120,10 @@ QGroupBox* SubkeyGenerateDialog::create_basic_info_group_box() {
 
   auto* vbox1 = new QGridLayout;
 
-  vbox1->addWidget(new QLabel(tr("Expiration Date:")), 2, 0);
-  vbox1->addWidget(new QLabel(tr("Never Expire")), 2, 3);
-  vbox1->addWidget(new QLabel(tr("KeySize (in Bit):")), 1, 0);
-  vbox1->addWidget(new QLabel(tr("Key Type:")), 0, 0);
+  vbox1->addWidget(new QLabel(QString(_("Expiration Date")) + ": "), 2, 0);
+  vbox1->addWidget(new QLabel(QString(_("Never Expire")) + ": "), 2, 3);
+  vbox1->addWidget(new QLabel(QString(_("KeySize (in Bit)")) + ": "), 1, 0);
+  vbox1->addWidget(new QLabel(QString(_("Key Type")) + ": "), 0, 0);
 
   vbox1->addWidget(dateEdit, 2, 1);
   vbox1->addWidget(expireCheckBox, 2, 2);
@@ -132,7 +132,7 @@ QGroupBox* SubkeyGenerateDialog::create_basic_info_group_box() {
 
   auto basicInfoGroupBox = new QGroupBox();
   basicInfoGroupBox->setLayout(vbox1);
-  basicInfoGroupBox->setTitle(tr("Basic Information"));
+  basicInfoGroupBox->setTitle(_("Basic Information"));
 
   return basicInfoGroupBox;
 }
@@ -215,17 +215,19 @@ void SubkeyGenerateDialog::refresh_widgets_state() {
 }
 
 void SubkeyGenerateDialog::slotKeyGenAccept() {
-  QString errorString = "";
+  std::stringstream err_stream;
 
   /**
    * primary keys should have a reasonable expiration date (no more than 2 years
    * in the future)
    */
   if (dateEdit->dateTime() > QDateTime::currentDateTime().addYears(2)) {
-    errorString.append(tr("  Expiration time no more than 2 years.  "));
+    err_stream << "  " << _("Expiration time no more than 2 years.") << "  ";
   }
 
-  if (errorString.isEmpty()) {
+  auto err_string = err_stream.str();
+
+  if (err_string.empty()) {
     genKeyInfo->setKeySize(keySizeSpinBox->value());
 
     if (expireCheckBox->checkState()) {
@@ -255,15 +257,15 @@ void SubkeyGenerateDialog::slotKeyGenAccept() {
       auto* msg_box = new QMessageBox(nullptr);
       msg_box->setAttribute(Qt::WA_DeleteOnClose);
       msg_box->setStandardButtons(QMessageBox::Ok);
-      msg_box->setWindowTitle(tr("Success"));
-      msg_box->setText(tr("The new subkey has been generated."));
+      msg_box->setWindowTitle(_("Success"));
+      msg_box->setText(_("The new subkey has been generated."));
       msg_box->setModal(false);
       msg_box->open();
 
       emit SubKeyGenerated();
       this->close();
     } else
-      QMessageBox::critical(this, tr("Failure"), tr(gpgme_strerror(error)));
+      QMessageBox::critical(this, _("Failure"), _(gpgme_strerror(error)));
 
   } else {
     /**
@@ -273,7 +275,7 @@ void SubkeyGenerateDialog::slotKeyGenAccept() {
     QPalette error = errorLabel->palette();
     error.setColor(QPalette::Window, "#ff8080");
     errorLabel->setPalette(error);
-    errorLabel->setText(errorString);
+    errorLabel->setText(err_string.c_str());
 
     this->show();
   }
diff --git a/src/ui/keygen/SubkeyGenerateDialog.h b/src/ui/keygen/SubkeyGenerateDialog.h
index 12f608d0..ec7c9fb1 100644
--- a/src/ui/keygen/SubkeyGenerateDialog.h
+++ b/src/ui/keygen/SubkeyGenerateDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/EditSubKeyDialog.cpp b/src/ui/keypair_details/EditSubKeyDialog.cpp
index e44c987f..6c2e0ce1 100644
--- a/src/ui/keypair_details/EditSubKeyDialog.cpp
+++ b/src/ui/keypair_details/EditSubKeyDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/EditSubKeyDialog.h b/src/ui/keypair_details/EditSubKeyDialog.h
index 6577d382..51842405 100644
--- a/src/ui/keypair_details/EditSubKeyDialog.h
+++ b/src/ui/keypair_details/EditSubKeyDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -25,10 +25,6 @@
 #ifndef GPGFRONTEND_EDITSUBKEY_H
 #define GPGFRONTEND_EDITSUBKEY_H
 
+class EditSubKeyDialog {};
 
-class EditSubKeyDialog {
-
-};
-
-
-#endif //GPGFRONTEND_EDITSUBKEY_H
+#endif  // GPGFRONTEND_EDITSUBKEY_H
diff --git a/src/ui/keypair_details/KeyDetailsDialog.cpp b/src/ui/keypair_details/KeyDetailsDialog.cpp
index 54bc6286..f3cab771 100644
--- a/src/ui/keypair_details/KeyDetailsDialog.cpp
+++ b/src/ui/keypair_details/KeyDetailsDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -28,16 +28,16 @@ namespace GpgFrontend::UI {
 KeyDetailsDialog::KeyDetailsDialog(const GpgKey& key, QWidget* parent)
     : QDialog(parent) {
   tabWidget = new QTabWidget();
-  tabWidget->addTab(new KeyPairDetailTab(key.id(), tabWidget), tr("KeyPair"));
-  tabWidget->addTab(new KeyPairUIDTab(key.id(), tabWidget), tr("UIDs"));
-  tabWidget->addTab(new KeyPairSubkeyTab(key.id(), tabWidget), tr("Subkeys"));
+  tabWidget->addTab(new KeyPairDetailTab(key.id(), tabWidget), _("KeyPair"));
+  tabWidget->addTab(new KeyPairUIDTab(key.id(), tabWidget), _("UIDs"));
+  tabWidget->addTab(new KeyPairSubkeyTab(key.id(), tabWidget), _("Subkeys"));
 
   auto* mainLayout = new QVBoxLayout;
   mainLayout->addWidget(tabWidget);
 
   this->setAttribute(Qt::WA_DeleteOnClose, true);
   this->setLayout(mainLayout);
-  this->setWindowTitle(tr("Key Details"));
+  this->setWindowTitle(_("Key Details"));
   this->setModal(true);
   this->setMinimumSize(380, 620);
   this->show();
diff --git a/src/ui/keypair_details/KeyDetailsDialog.h b/src/ui/keypair_details/KeyDetailsDialog.h
index 0f7342aa..51fc01cf 100644
--- a/src/ui/keypair_details/KeyDetailsDialog.h
+++ b/src/ui/keypair_details/KeyDetailsDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/KeyNewUIDDialog.cpp b/src/ui/keypair_details/KeyNewUIDDialog.cpp
index 00401231..809a05f8 100644
--- a/src/ui/keypair_details/KeyNewUIDDialog.cpp
+++ b/src/ui/keypair_details/KeyNewUIDDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -41,9 +41,9 @@ KeyNewUIDDialog::KeyNewUIDDialog(const KeyId& key_id, QWidget* parent)
   errorLabel = new QLabel();
 
   auto gridLayout = new QGridLayout();
-  gridLayout->addWidget(new QLabel(tr("Name")), 0, 0);
-  gridLayout->addWidget(new QLabel(tr("Email")), 1, 0);
-  gridLayout->addWidget(new QLabel(tr("Comment")), 2, 0);
+  gridLayout->addWidget(new QLabel(_("Name")), 0, 0);
+  gridLayout->addWidget(new QLabel(_("Email")), 1, 0);
+  gridLayout->addWidget(new QLabel(_("Comment")), 2, 0);
 
   gridLayout->addWidget(name, 0, 1);
   gridLayout->addWidget(email, 1, 1);
@@ -51,14 +51,14 @@ KeyNewUIDDialog::KeyNewUIDDialog(const KeyId& key_id, QWidget* parent)
 
   gridLayout->addWidget(createButton, 3, 0, 1, 2);
   gridLayout->addWidget(
-      new QLabel(tr("Notice: The New UID Created will be set as Primary.")), 4,
+      new QLabel(_("Notice: The New UID Created will be set as Primary.")), 4,
       0, 1, 2);
   gridLayout->addWidget(errorLabel, 5, 0, 1, 2);
 
   connect(createButton, SIGNAL(clicked(bool)), this, SLOT(slotCreateNewUID()));
 
   this->setLayout(gridLayout);
-  this->setWindowTitle(tr("Create New UID"));
+  this->setWindowTitle(_("Create New UID"));
   this->setAttribute(Qt::WA_DeleteOnClose, true);
   this->setModal(true);
 
@@ -67,19 +67,20 @@ KeyNewUIDDialog::KeyNewUIDDialog(const KeyId& key_id, QWidget* parent)
 }
 
 void KeyNewUIDDialog::slotCreateNewUID() {
-  QString errorString = "";
+  std::stringstream error_stream;
 
   /**
    * check for errors in keygen dialog input
    */
   if ((name->text()).size() < 5) {
-    errorString.append(tr("  Name must contain at least five characters.  \n"));
+    error_stream << "  " << _("Name must contain at least five characters.")
+                 << std::endl;
   }
   if (email->text().isEmpty() || !check_email_address(email->text())) {
-    errorString.append(tr("  Please give a email address.   \n"));
+    error_stream << "  " << _("Please give a email address.") << std::endl;
   }
-
-  if (errorString.isEmpty()) {
+  auto error_string = error_stream.str();
+  if (error_string.empty()) {
     if (UidOperator::GetInstance().addUID(mKey, name->text().toStdString(),
                                           comment->text().toStdString(),
                                           email->text().toStdString())) {
@@ -96,7 +97,7 @@ void KeyNewUIDDialog::slotCreateNewUID() {
     QPalette error = errorLabel->palette();
     error.setColor(QPalette::Window, "#ff8080");
     errorLabel->setPalette(error);
-    errorLabel->setText(errorString);
+    errorLabel->setText(error_string.c_str());
 
     this->show();
   }
diff --git a/src/ui/keypair_details/KeyNewUIDDialog.h b/src/ui/keypair_details/KeyNewUIDDialog.h
index 73c4aa7b..2e38a7f4 100644
--- a/src/ui/keypair_details/KeyNewUIDDialog.h
+++ b/src/ui/keypair_details/KeyNewUIDDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -35,8 +35,8 @@ class KeyNewUIDDialog : public QDialog {
  public:
   KeyNewUIDDialog(const KeyId& key, QWidget* parent = nullptr);
 
-  signals:
-   void signalUIDCreated();
+ signals:
+  void signalUIDCreated();
 
  private slots:
 
diff --git a/src/ui/keypair_details/KeyPairDetailTab.cpp b/src/ui/keypair_details/KeyPairDetailTab.cpp
index 34639cbb..a7d082d1 100644
--- a/src/ui/keypair_details/KeyPairDetailTab.cpp
+++ b/src/ui/keypair_details/KeyPairDetailTab.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -34,10 +34,10 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
     : QWidget(parent), mKey(GpgKeyGetter::GetInstance().GetKey(key_id)) {
   keyid = mKey.id();
 
-  ownerBox = new QGroupBox(tr("Owner"));
-  keyBox = new QGroupBox(tr("Master Key"));
-  fingerprintBox = new QGroupBox(tr("Fingerprint"));
-  additionalUidBox = new QGroupBox(tr("Additional UIDs"));
+  ownerBox = new QGroupBox(_("Owner"));
+  keyBox = new QGroupBox(_("Master Key"));
+  fingerprintBox = new QGroupBox(_("Fingerprint"));
+  additionalUidBox = new QGroupBox(_("Additional UIDs"));
 
   nameVarLabel = new QLabel();
   nameVarLabel->setTextInteractionFlags(Qt::TextSelectableByMouse);
@@ -59,7 +59,7 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
 
   // Show the situation that master key not exists.
   masterKeyExistVarLabel =
-      new QLabel(mKey.has_master_key() ? tr("Exists") : tr("Not Exists"));
+      new QLabel(mKey.has_master_key() ? _("Exists") : _("Not Exists"));
   if (!mKey.has_master_key()) {
     auto paletteExpired = masterKeyExistVarLabel->palette();
     paletteExpired.setColor(masterKeyExistVarLabel->foregroundRole(), Qt::red);
@@ -85,21 +85,22 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
   auto* vboxKD = new QGridLayout();
   auto* vboxOD = new QGridLayout();
 
-  vboxOD->addWidget(new QLabel(tr("Name:")), 0, 0);
-  vboxOD->addWidget(new QLabel(tr("Email Address:")), 1, 0);
-  vboxOD->addWidget(new QLabel(tr("Comment:")), 2, 0);
+  vboxOD->addWidget(new QLabel(QString(_("Name")) + ": "), 0, 0);
+  vboxOD->addWidget(new QLabel(QString(_("Email Address")) + ": "), 1, 0);
+  vboxOD->addWidget(new QLabel(QString(_("Comment")) + ": "), 2, 0);
   vboxOD->addWidget(nameVarLabel, 0, 1);
   vboxOD->addWidget(emailVarLabel, 1, 1);
   vboxOD->addWidget(commentVarLabel, 2, 1);
 
-  vboxKD->addWidget(new QLabel(tr("Key ID: ")), 0, 0);
-  vboxKD->addWidget(new QLabel(tr("Algorithm: ")), 1, 0);
-  vboxKD->addWidget(new QLabel(tr("Key Size:")), 2, 0);
-  vboxKD->addWidget(new QLabel(tr("Nominal Usage: ")), 3, 0);
-  vboxKD->addWidget(new QLabel(tr("Actual Usage: ")), 4, 0);
-  vboxKD->addWidget(new QLabel(tr("Expires on: ")), 5, 0);
-  vboxKD->addWidget(new QLabel(tr("Last Update: ")), 6, 0);
-  vboxKD->addWidget(new QLabel(tr("Secret Key Existence: ")), 7, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Key ID")) + ": "), 0, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Algorithm")) + ": "), 1, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Key Size")) + ": "), 2, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Nominal Usage")) + ": "), 3, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Actual Usage")) + ": "), 4, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Expires on")) + ": "), 5, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Last Update")) + ": "), 6, 0);
+  vboxKD->addWidget(new QLabel(QString(_("Secret Key Existence")) + ": "), 7,
+                    0);
 
   vboxKD->addWidget(keySizeVarLabel, 2, 1);
   vboxKD->addWidget(expireVarLabel, 5, 1);
@@ -123,9 +124,9 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
 
   hboxFP->addWidget(fingerPrintVarLabel);
 
-  auto* copyFingerprintButton = new QPushButton(tr("Copy"));
+  auto* copyFingerprintButton = new QPushButton(_("Copy"));
   copyFingerprintButton->setFlat(true);
-  copyFingerprintButton->setToolTip(tr("copy fingerprint to clipboard"));
+  copyFingerprintButton->setToolTip(_("copy fingerprint to clipboard"));
   connect(copyFingerprintButton, SIGNAL(clicked()), this,
           SLOT(slotCopyFingerprint()));
 
@@ -136,29 +137,29 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
   mvbox->addStretch();
 
   if (mKey.is_private_key()) {
-    auto* privKeyBox = new QGroupBox(tr("Operations"));
+    auto* privKeyBox = new QGroupBox(_("Operations"));
     auto* vboxPK = new QVBoxLayout();
 
     auto* exportButton =
-        new QPushButton(tr("Export Private Key (Include Subkey)"));
+        new QPushButton(_("Export Private Key (Include Subkey)"));
     vboxPK->addWidget(exportButton);
     connect(exportButton, SIGNAL(clicked()), this,
             SLOT(slotExportPrivateKey()));
 
     if (mKey.has_master_key()) {
       auto* editExpiresButton =
-          new QPushButton(tr("Modify Expiration Datetime (Master Key)"));
+          new QPushButton(_("Modify Expiration Datetime (Master Key)"));
       vboxPK->addWidget(editExpiresButton);
       connect(editExpiresButton, SIGNAL(clicked()), this,
               SLOT(slotModifyEditDatetime()));
 
       auto hBoxLayout = new QHBoxLayout();
       auto* keyServerOperaButton =
-          new QPushButton(tr("Key Server Operation (Pubkey)"));
+          new QPushButton(_("Key Server Operation (Pubkey)"));
       keyServerOperaButton->setStyleSheet("text-align:center;");
 
       auto* revokeCertGenButton =
-          new QPushButton(tr("Generate Revoke Certificate"));
+          new QPushButton(_("Generate Revoke Certificate"));
       connect(revokeCertGenButton, SIGNAL(clicked()), this,
               SLOT(slotGenRevokeCert()));
 
@@ -185,10 +186,10 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
     auto* expLabel = new QLabel();
     auto* iconLabel = new QLabel();
     if (mKey.expired()) {
-      expLabel->setText(tr("Warning: The Master Key has expired."));
+      expLabel->setText(_("Warning: The Master Key has expired."));
     }
     if (mKey.revoked()) {
-      expLabel->setText(tr("Warning: The Master Key has been revoked"));
+      expLabel->setText(_("Warning: The Master Key has been revoked"));
     }
 
     iconLabel->setPixmap(pixmap.scaled(24, 24, Qt::KeepAspectRatio));
@@ -215,11 +216,11 @@ KeyPairDetailTab::KeyPairDetailTab(const std::string& key_id, QWidget* parent)
 void KeyPairDetailTab::slotExportPrivateKey() {
   // Show a information box with explanation about private key
   int ret = QMessageBox::information(
-      this, tr("Exporting private Key"),
-      "<h3>" + tr("You are about to export your") + "<font color=\"red\">" +
-          tr(" PRIVATE KEY ") + "</font>!</h3>\n" +
-          tr("This is NOT your Public Key, so DON'T give it away.") + "<br />" +
-          tr("Do you REALLY want to export your PRIVATE KEY?"),
+      this, _("Exporting private Key"),
+      "<h3>" + QString(_("You are about to export your")) +
+          "<font color=\"red\">" + _(" PRIVATE KEY ") + "</font>!</h3>\n" +
+          _("This is NOT your Public Key, so DON'T give it away.") + "<br />" +
+          _("Do you REALLY want to export your PRIVATE KEY?"),
       QMessageBox::Cancel | QMessageBox::Ok);
 
   // export key, if ok was clicked
@@ -234,21 +235,21 @@ void KeyPairDetailTab::slotExportPrivateKey() {
 
     auto key = GpgKeyGetter::GetInstance().GetKey(keyid);
     if (!key.good()) {
-      QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+      QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
       return;
     }
     auto fileString =
         key.name() + " " + key.email() + "(" + key.id() + ")_secret.asc";
     auto fileName =
         QFileDialog::getSaveFileName(
-            this, tr("Export Key To File"), QString::fromStdString(fileString),
-            tr("Key Files") + " (*.asc *.txt);;All Files (*)")
+            this, _("Export Key To File"), QString::fromStdString(fileString),
+            QString(_("Key Files")) + " (*.asc *.txt);;All Files (*)")
             .toStdString();
 
     if (!write_buffer_to_file(fileName, *keyArray)) {
-      QMessageBox::critical(nullptr, tr("Export Error"),
-                            tr("Couldn't open %1 for writing")
-                                .arg(QString::fromStdString(fileName)));
+      QMessageBox::critical(
+          nullptr, _("Export Error"),
+          QString(_("Couldn't open %1 for writing")).arg(fileName.c_str()));
       return;
     }
   }
@@ -263,7 +264,7 @@ QString KeyPairDetailTab::beautifyFingerprint(QString fingerprint) {
 }
 
 void KeyPairDetailTab::slotCopyFingerprint() {
-  QString fpr = fingerPrintVarLabel->text().trimmed().replace(" ", "");
+  QString fpr = fingerPrintVarLabel->text().trimmed().replace(" ", QString());
   QClipboard* cb = QApplication::clipboard();
   cb->setText(fpr);
 }
@@ -305,7 +306,7 @@ void KeyPairDetailTab::slotRefreshKeyInfo() {
   keySizeVal = QString::number(mKey.length());
 
   if (to_time_t(boost::posix_time::ptime(mKey.expires())) == 0) {
-    keyExpireVal = tr("Never Expire");
+    keyExpireVal = _("Never Expire");
   } else {
     keyExpireVal =
         QString::fromStdString(boost::gregorian::to_iso_string(mKey.expires()));
@@ -327,10 +328,10 @@ void KeyPairDetailTab::slotRefreshKeyInfo() {
 void KeyPairDetailTab::createKeyServerOperaMenu() {
   keyServerOperaMenu = new QMenu(this);
 
-  auto* uploadKeyPair = new QAction(tr("Upload Key Pair to Key Server"), this);
+  auto* uploadKeyPair = new QAction(_("Upload Key Pair to Key Server"), this);
   connect(uploadKeyPair, SIGNAL(triggered()), this,
           SLOT(slotUploadKeyToServer()));
-  auto* updateKeyPair = new QAction(tr("Update Key Pair"), this);
+  auto* updateKeyPair = new QAction(_("Update Key Pair"), this);
   connect(updateKeyPair, SIGNAL(triggered()), this,
           SLOT(slotUpdateKeyToServer()));
 
@@ -356,8 +357,8 @@ void KeyPairDetailTab::slotUpdateKeyToServer() {
 
 void KeyPairDetailTab::slotGenRevokeCert() {
   auto mOutputFileName = QFileDialog::getSaveFileName(
-      this, tr("Generate revocation certificate"), QString(),
-      QStringLiteral("%1 (*.rev)").arg(tr("Revocation Certificates")));
+      this, _("Generate revocation certificate"), QString(),
+      QStringLiteral("%1 (*.rev)").arg(_("Revocation Certificates")));
 
   //  if (!mOutputFileName.isEmpty())
   //    mCtx->generateRevokeCert(mKey, mOutputFileName);
diff --git a/src/ui/keypair_details/KeyPairDetailTab.h b/src/ui/keypair_details/KeyPairDetailTab.h
index 5f6e93fe..782696ac 100644
--- a/src/ui/keypair_details/KeyPairDetailTab.h
+++ b/src/ui/keypair_details/KeyPairDetailTab.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/KeyPairSubkeyTab.cpp b/src/ui/keypair_details/KeyPairSubkeyTab.cpp
index 61007b37..7b239bf1 100644
--- a/src/ui/keypair_details/KeyPairSubkeyTab.cpp
+++ b/src/ui/keypair_details/KeyPairSubkeyTab.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -39,7 +39,7 @@ KeyPairSubkeyTab::KeyPairSubkeyTab(const std::string& key_id, QWidget* parent)
 
   auto uidButtonsLayout = new QGridLayout();
 
-  auto addSubkeyButton = new QPushButton(tr("Generate A New Subkey"));
+  auto addSubkeyButton = new QPushButton(_("Generate A New Subkey"));
   if (!mKey.is_private_key() || !mKey.has_master_key()) {
     addSubkeyButton->setDisabled(true);
     setHidden(addSubkeyButton);
@@ -56,14 +56,20 @@ KeyPairSubkeyTab::KeyPairSubkeyTab(const std::string& key_id, QWidget* parent)
 
   auto* subkeyDetailLayout = new QGridLayout();
 
-  subkeyDetailLayout->addWidget(new QLabel(tr("Key ID: ")), 0, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Algorithm: ")), 1, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Key Size:")), 2, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Usage: ")), 3, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Expires On ")), 4, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Last Update: ")), 5, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Existence: ")), 6, 0);
-  subkeyDetailLayout->addWidget(new QLabel(tr("Fingerprint: ")), 7, 0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Key ID")) + ": "), 0, 0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Algorithm")) + ": "), 1,
+                                0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Key Size")) + ": "), 2,
+                                0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Usage")) + ": "), 3, 0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Expires On")) + ": "), 4,
+                                0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Last Update")) + ": "), 5,
+                                0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Existence")) + ": "), 6,
+                                0);
+  subkeyDetailLayout->addWidget(new QLabel(QString(_("Fingerprint")) + ": "), 7,
+                                0);
 
   keyidVarLabel = new QLabel();
   keySizeVarLabel = new QLabel();
@@ -128,8 +134,8 @@ void KeyPairSubkeyTab::createSubkeyList() {
   subkeyList->setAlternatingRowColors(true);
 
   QStringList labels;
-  labels << tr("Subkey ID") << tr("Key Size") << tr("Algo") << tr("Create Date")
-         << tr("Expire Date");
+  labels << _("Subkey ID") << _("Key Size") << _("Algo") << _("Create Date")
+         << _("Expire Date");
 
   subkeyList->setHorizontalHeaderLabels(labels);
   subkeyList->horizontalHeader()->setStretchLastSection(false);
@@ -172,7 +178,7 @@ void KeyPairSubkeyTab::slotRefreshSubkeyList() {
     auto* tmp4 = new QTableWidgetItem(
         boost::posix_time::to_time_t(
             boost::posix_time::ptime(subkeys.expires())) == 0
-            ? tr("Never Expire")
+            ? _("Never Expire")
             : QString::fromStdString(to_iso_string(subkeys.expires())));
     tmp4->setTextAlignment(Qt::AlignCenter);
     subkeyList->setItem(row, 4, tmp4);
@@ -207,7 +213,7 @@ void KeyPairSubkeyTab::slotRefreshSubkeyDetail() {
 
   expireVarLabel->setText(
       subkey_time_t == 0
-          ? tr("Never Expires")
+          ? _("Never Expires")
           : QString::fromStdString(to_iso_string(subkey.expires())));
   if (subkey_time_t != 0 &&
       subkey.expires() < boost::posix_time::second_clock::local_time().date()) {
@@ -227,15 +233,16 @@ void KeyPairSubkeyTab::slotRefreshSubkeyDetail() {
   QString usage;
   QTextStream usage_steam(&usage);
 
-  if (subkey.can_certify()) usage_steam << "Cert ";
-  if (subkey.can_encrypt()) usage_steam << "Encr ";
-  if (subkey.can_sign()) usage_steam << "Sign ";
-  if (subkey.can_authenticate()) usage_steam << "Auth ";
+  if (subkey.can_certify()) usage_steam << _("Cert") << " ";
+  if (subkey.can_encrypt()) usage_steam << _("Encr") << " ";
+  if (subkey.can_sign()) usage_steam << _("Sign") << " ";
+  if (subkey.can_authenticate()) usage_steam << _("Auth") << " ";
 
   usageVarLabel->setText(usage);
 
   // Show the situation that master key not exists.
-  masterKeyExistVarLabel->setText(subkey.secret() ? "Exists" : "Not Exists");
+  masterKeyExistVarLabel->setText(subkey.secret() ? _("Exists")
+                                                  : _("Not Exists"));
   if (!subkey.secret()) {
     auto paletteExpired = masterKeyExistVarLabel->palette();
     paletteExpired.setColor(masterKeyExistVarLabel->foregroundRole(), Qt::red);
@@ -252,8 +259,8 @@ void KeyPairSubkeyTab::slotRefreshSubkeyDetail() {
 
 void KeyPairSubkeyTab::createSubkeyOperaMenu() {
   subkeyOperaMenu = new QMenu(this);
-  // auto *revokeSubkeyAct = new QAction(tr("Revoke Subkey"));
-  auto* editSubkeyAct = new QAction(tr("Edit Expire Date"));
+  // auto *revokeSubkeyAct = new QAction(_("Revoke Subkey"));
+  auto* editSubkeyAct = new QAction(_("Edit Expire Date"));
   connect(editSubkeyAct, SIGNAL(triggered(bool)), this, SLOT(slotEditSubkey()));
 
   // subkeyOperaMenu->addAction(revokeSubkeyAct);
diff --git a/src/ui/keypair_details/KeyPairSubkeyTab.h b/src/ui/keypair_details/KeyPairSubkeyTab.h
index 6466d8b4..018f6ddc 100644
--- a/src/ui/keypair_details/KeyPairSubkeyTab.h
+++ b/src/ui/keypair_details/KeyPairSubkeyTab.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -25,10 +25,9 @@
 #ifndef GPGFRONTEND_KEYPAIRSUBKEYTAB_H
 #define GPGFRONTEND_KEYPAIRSUBKEYTAB_H
 
-#include "ui/GpgFrontendUI.h"
-
 #include "KeySetExpireDateDialog.h"
 #include "gpg/GpgContext.h"
+#include "ui/GpgFrontendUI.h"
 #include "ui/keygen/SubkeyGenerateDialog.h"
 
 namespace GpgFrontend::UI {
diff --git a/src/ui/keypair_details/KeyPairUIDTab.cpp b/src/ui/keypair_details/KeyPairUIDTab.cpp
index f787bebd..7358c20a 100644
--- a/src/ui/keypair_details/KeyPairUIDTab.cpp
+++ b/src/ui/keypair_details/KeyPairUIDTab.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -41,8 +41,8 @@ KeyPairUIDTab::KeyPairUIDTab(const std::string& key_id, QWidget* parent)
 
   auto uidButtonsLayout = new QGridLayout();
 
-  auto addUIDButton = new QPushButton(tr("New UID"));
-  auto manageUIDButton = new QPushButton(tr("UID Management"));
+  auto addUIDButton = new QPushButton(_("New UID"));
+  auto manageUIDButton = new QPushButton(_("UID Management"));
 
   if (mKey.has_master_key()) {
     manageUIDButton->setMenu(manageSelectedUIDMenu);
@@ -61,7 +61,7 @@ KeyPairUIDTab::KeyPairUIDTab(const std::string& key_id, QWidget* parent)
 
   auto uidGroupBox = new QGroupBox();
   uidGroupBox->setLayout(gridLayout);
-  uidGroupBox->setTitle(tr("UIDs"));
+  uidGroupBox->setTitle(_("UIDs"));
 
   auto signGridLayout = new QGridLayout();
   signGridLayout->addWidget(sigList, 0, 0);
@@ -69,7 +69,7 @@ KeyPairUIDTab::KeyPairUIDTab(const std::string& key_id, QWidget* parent)
 
   auto signGroupBox = new QGroupBox();
   signGroupBox->setLayout(signGridLayout);
-  signGroupBox->setTitle(tr("Signature of Selected UID"));
+  signGroupBox->setTitle(_("Signature of Selected UID"));
 
   auto vboxLayout = new QVBoxLayout();
   vboxLayout->addWidget(uidGroupBox);
@@ -112,7 +112,7 @@ void KeyPairUIDTab::createUIDList() {
   uidList->setAlternatingRowColors(true);
 
   QStringList labels;
-  labels << tr("Select") << tr("Name") << tr("Email") << tr("Comment");
+  labels << _("Select") << _("Name") << _("Email") << _("Comment");
   uidList->setHorizontalHeaderLabels(labels);
   uidList->horizontalHeader()->setStretchLastSection(true);
 }
@@ -135,8 +135,8 @@ void KeyPairUIDTab::createSignList() {
   sigList->setAlternatingRowColors(true);
 
   QStringList labels;
-  labels << tr("Key ID") << tr("Name") << tr("Email") << tr("Create Date")
-         << tr("Expired Date");
+  labels << _("Key ID") << _("Name") << _("Email") << _("Create Date")
+         << _("Expired Date");
   sigList->setHorizontalHeaderLabels(labels);
   sigList->horizontalHeader()->setStretchLastSection(false);
 }
@@ -235,7 +235,7 @@ void KeyPairUIDTab::slotRefreshSigList() {
       auto* tmp5 = new QTableWidgetItem(
           boost::posix_time::to_time_t(
               boost::posix_time::ptime(sig.expire_time())) == 0
-              ? tr("Never Expires")
+              ? _("Never Expires")
               : QString::fromStdString(
                     boost::gregorian::to_iso_string(sig.expire_time())));
       tmp5->setTextAlignment(Qt::AlignCenter);
@@ -253,8 +253,8 @@ void KeyPairUIDTab::slotAddSign() {
 
   if (selected_uids->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one or more UIDs before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one or more UIDs before doing this operation."));
     return;
   }
 
@@ -275,9 +275,9 @@ UIDArgsListPtr KeyPairUIDTab::getUIDChecked() {
 void KeyPairUIDTab::createManageUIDMenu() {
   manageSelectedUIDMenu = new QMenu(this);
 
-  auto* signUIDAct = new QAction(tr("Sign Selected UID(s)"), this);
+  auto* signUIDAct = new QAction(_("Sign Selected UID(s)"), this);
   connect(signUIDAct, SIGNAL(triggered()), this, SLOT(slotAddSign()));
-  auto* delUIDAct = new QAction(tr("Delete Selected UID(s)"), this);
+  auto* delUIDAct = new QAction(_("Delete Selected UID(s)"), this);
   connect(delUIDAct, SIGNAL(triggered()), this, SLOT(slotDelUID()));
 
   if (mKey.has_master_key()) {
@@ -297,11 +297,11 @@ void KeyPairUIDTab::slotAddUID() {
 
 void KeyPairUIDTab::slotAddUIDResult(int result) {
   if (result == 1) {
-    QMessageBox::information(nullptr, tr("Successful Operation"),
-                             tr("Successfully added a new UID."));
+    QMessageBox::information(nullptr, _("Successful Operation"),
+                             _("Successfully added a new UID."));
   } else if (result == -1) {
-    QMessageBox::critical(nullptr, tr("Operation Failed"),
-                          tr("An error occurred during the operation."));
+    QMessageBox::critical(nullptr, _("Operation Failed"),
+                          _("An error occurred during the operation."));
   }
 }
 
@@ -310,8 +310,8 @@ void KeyPairUIDTab::slotDelUID() {
 
   if (selected_uids->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one or more UIDs before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one or more UIDs before doing this operation."));
     return;
   }
 
@@ -322,10 +322,12 @@ void KeyPairUIDTab::slotDelUID() {
   }
 
   int ret = QMessageBox::warning(
-      this, tr("Deleting UIDs"),
-      "<b>" + tr("Are you sure that you want to delete the following uids?") +
+      this, _("Deleting UIDs"),
+      "<b>" +
+          QString(
+              _("Are you sure that you want to delete the following UIDs?")) +
           "</b><br/><br/>" + keynames + +"<br/>" +
-          tr("The action can not be undone."),
+          _("The action can not be undone."),
       QMessageBox::No | QMessageBox::Yes);
 
   bool if_all_success = true;
@@ -340,8 +342,8 @@ void KeyPairUIDTab::slotDelUID() {
 
     if (!if_all_success) {
       QMessageBox::critical(
-          nullptr, tr("Operation Failed"),
-          tr("At least an error occurred during the operation."));
+          nullptr, _("Operation Failed"),
+          _("At least an error occurred during the operation."));
     }
     emit signalUpdateUIDInfo();
   }
@@ -363,17 +365,18 @@ void KeyPairUIDTab::slotSetPrimaryUID() {
   keynames.append("<br/>");
 
   int ret = QMessageBox::warning(
-      this, tr("Set Primary UID"),
-      "<b>" + tr("Are you sure that you want to set the Primary UID to?") +
+      this, _("Set Primary UID"),
+      "<b>" +
+          QString(_("Are you sure that you want to set the Primary UID to?")) +
           "</b><br/><br/>" + keynames + +"<br/>" +
-          tr("The action can not be undone."),
+          _("The action can not be undone."),
       QMessageBox::No | QMessageBox::Yes);
 
   if (ret == QMessageBox::Yes) {
     if (!UidOperator::GetInstance().setPrimaryUID(mKey,
                                                   selected_uids->front())) {
-      QMessageBox::critical(nullptr, tr("Operation Failed"),
-                            tr("An error occurred during the operation."));
+      QMessageBox::critical(nullptr, _("Operation Failed"),
+                            _("An error occurred during the operation."));
     } else {
       emit signalUpdateUIDInfo();
     }
@@ -404,12 +407,12 @@ SignIdArgsListPtr KeyPairUIDTab::getSignSelected() {
 void KeyPairUIDTab::createUIDPopupMenu() {
   uidPopupMenu = new QMenu(this);
 
-  auto* serPrimaryUIDAct = new QAction(tr("Set As Primary"), this);
+  auto* serPrimaryUIDAct = new QAction(_("Set As Primary"), this);
   connect(serPrimaryUIDAct, SIGNAL(triggered()), this,
           SLOT(slotSetPrimaryUID()));
-  auto* signUIDAct = new QAction(tr("Sign UID"), this);
+  auto* signUIDAct = new QAction(_("Sign UID"), this);
   connect(signUIDAct, SIGNAL(triggered()), this, SLOT(slotAddSignSingle()));
-  auto* delUIDAct = new QAction(tr("Delete UID"), this);
+  auto* delUIDAct = new QAction(_("Delete UID"), this);
   connect(delUIDAct, SIGNAL(triggered()), this, SLOT(slotDelUIDSingle()));
 
   if (mKey.has_master_key()) {
@@ -435,8 +438,8 @@ void KeyPairUIDTab::slotAddSignSingle() {
 
   if (selected_uids->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one UID before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one UID before doing this operation."));
     return;
   }
 
@@ -449,8 +452,8 @@ void KeyPairUIDTab::slotDelUIDSingle() {
   auto selected_uids = getUIDSelected();
   if (selected_uids->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one UID before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one UID before doing this operation."));
     return;
   }
 
@@ -460,16 +463,18 @@ void KeyPairUIDTab::slotDelUIDSingle() {
   keynames.append("<br/>");
 
   int ret = QMessageBox::warning(
-      this, tr("Deleting UID"),
-      "<b>" + tr("Are you sure that you want to delete the following uid?") +
+      this, _("Deleting UID"),
+      "<b>" +
+          QString(
+              _("Are you sure that you want to delete the following uid?")) +
           "</b><br/><br/>" + keynames + +"<br/>" +
-          tr("The action can not be undone."),
+          _("The action can not be undone."),
       QMessageBox::No | QMessageBox::Yes);
 
   if (ret == QMessageBox::Yes) {
     if (!UidOperator::GetInstance().revUID(mKey, selected_uids->front())) {
-      QMessageBox::critical(nullptr, tr("Operation Failed"),
-                            tr("An error occurred during the operation."));
+      QMessageBox::critical(nullptr, _("Operation Failed"),
+                            _("An error occurred during the operation."));
     } else {
       emit signalUpdateUIDInfo();
     }
@@ -479,7 +484,7 @@ void KeyPairUIDTab::slotDelUIDSingle() {
 void KeyPairUIDTab::createSignPopupMenu() {
   signPopupMenu = new QMenu(this);
 
-  auto* delSignAct = new QAction(tr("Delete(Revoke) Key Signature"), this);
+  auto* delSignAct = new QAction(_("Delete(Revoke) Key Signature"), this);
   connect(delSignAct, SIGNAL(triggered()), this, SLOT(slotDelSign()));
 
   signPopupMenu->addAction(delSignAct);
@@ -489,8 +494,8 @@ void KeyPairUIDTab::slotDelSign() {
   auto selected_signs = getSignSelected();
   if (selected_signs->empty()) {
     QMessageBox::information(
-        nullptr, tr("Invalid Operation"),
-        tr("Please select one Key Signature before doing this operation."));
+        nullptr, _("Invalid Operation"),
+        _("Please select one Key Signature before doing this operation."));
     return;
   }
 
@@ -498,9 +503,9 @@ void KeyPairUIDTab::slotDelSign() {
            .GetKey(selected_signs->front().first)
            .good()) {
     QMessageBox::critical(
-        nullptr, tr("Invalid Operation"),
-        tr("To delete the signature, you need to have its corresponding public "
-           "key in the local database."));
+        nullptr, _("Invalid Operation"),
+        _("To delete the signature, you need to have its corresponding public "
+          "key in the local database."));
     return;
   }
 
@@ -509,18 +514,19 @@ void KeyPairUIDTab::slotDelSign() {
   keynames.append(QString::fromStdString(selected_signs->front().second));
   keynames.append("<br/>");
 
-  int ret = QMessageBox::warning(
-      this, tr("Deleting Key Signature"),
-      "<b>" +
-          tr("Are you sure that you want to delete the following signature?") +
-          "</b><br/><br/>" + keynames + +"<br/>" +
-          tr("The action can not be undone."),
-      QMessageBox::No | QMessageBox::Yes);
+  int ret =
+      QMessageBox::warning(this, _("Deleting Key Signature"),
+                           "<b>" +
+                               QString(_("Are you sure that you want to delete "
+                                         "the following signature?")) +
+                               "</b><br/><br/>" + keynames + +"<br/>" +
+                               _("The action can not be undone."),
+                           QMessageBox::No | QMessageBox::Yes);
 
   if (ret == QMessageBox::Yes) {
     if (!GpgKeyManager::GetInstance().revSign(mKey, selected_signs)) {
-      QMessageBox::critical(nullptr, tr("Operation Failed"),
-                            tr("An error occurred during the operation."));
+      QMessageBox::critical(nullptr, _("Operation Failed"),
+                            _("An error occurred during the operation."));
     }
   }
 }
diff --git a/src/ui/keypair_details/KeyPairUIDTab.h b/src/ui/keypair_details/KeyPairUIDTab.h
index 1f88e7b7..6dece8d5 100644
--- a/src/ui/keypair_details/KeyPairUIDTab.h
+++ b/src/ui/keypair_details/KeyPairUIDTab.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/KeySetExpireDateDialog.cpp b/src/ui/keypair_details/KeySetExpireDateDialog.cpp
index 2c5b837f..d197a76b 100644
--- a/src/ui/keypair_details/KeySetExpireDateDialog.cpp
+++ b/src/ui/keypair_details/KeySetExpireDateDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -69,15 +69,15 @@ void KeySetExpireDateDialog::slotConfirm() {
     auto* msg_box = new QMessageBox(nullptr);
     msg_box->setAttribute(Qt::WA_DeleteOnClose);
     msg_box->setStandardButtons(QMessageBox::Ok);
-    msg_box->setWindowTitle(tr("Success"));
-    msg_box->setText(tr("The expire date of the key pair has been updated."));
+    msg_box->setWindowTitle(_("Success"));
+    msg_box->setText(_("The expire date of the key pair has been updated."));
     msg_box->setModal(false);
     msg_box->open();
 
     emit signalKeyExpireDateUpdated();
 
   } else {
-    QMessageBox::critical(this, tr("Failure"), tr(gpgme_strerror(err)));
+    QMessageBox::critical(this, _("Failure"), _(gpgme_strerror(err)));
   }
 
   this->close();
@@ -90,12 +90,12 @@ void KeySetExpireDateDialog::init() {
   dateTimeEdit->setMaximumDateTime(maxDateTime);
   nonExpiredCheck = new QCheckBox();
   nonExpiredCheck->setTristate(false);
-  confirmButton = new QPushButton(tr("Confirm"));
+  confirmButton = new QPushButton(_("Confirm"));
 
   auto* gridLayout = new QGridLayout();
   gridLayout->addWidget(dateTimeEdit, 0, 0, 1, 2);
   gridLayout->addWidget(nonExpiredCheck, 0, 2, 1, 1, Qt::AlignRight);
-  gridLayout->addWidget(new QLabel(tr("Never Expire")), 0, 3);
+  gridLayout->addWidget(new QLabel(_("Never Expire")), 0, 3);
   gridLayout->addWidget(confirmButton, 1, 3);
 
   connect(nonExpiredCheck, SIGNAL(stateChanged(int)), this,
diff --git a/src/ui/keypair_details/KeySetExpireDateDialog.h b/src/ui/keypair_details/KeySetExpireDateDialog.h
index f9779005..37a7f7e4 100644
--- a/src/ui/keypair_details/KeySetExpireDateDialog.h
+++ b/src/ui/keypair_details/KeySetExpireDateDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/keypair_details/KeyUIDSignDialog.cpp b/src/ui/keypair_details/KeyUIDSignDialog.cpp
index 0614024f..6cce116b 100644
--- a/src/ui/keypair_details/KeyUIDSignDialog.cpp
+++ b/src/ui/keypair_details/KeyUIDSignDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -78,7 +78,7 @@ KeyUIDSignDialog::KeyUIDSignDialog(const GpgKey& key, UIDArgsListPtr uid,
 
   layout->addWidget(mKeyList, 0, 0);
   layout->addWidget(signKeyButton, 2, 0, Qt::AlignRight);
-  timeLayout->addWidget(new QLabel(tr("Expire Date")), 0, 0);
+  timeLayout->addWidget(new QLabel(_("Expire Date")), 0, 0);
   timeLayout->addWidget(expiresEdit, 0, 1);
   timeLayout->addWidget(nonExpireCheck, 0, 2);
   layout->addLayout(timeLayout, 1, 0);
@@ -87,7 +87,7 @@ KeyUIDSignDialog::KeyUIDSignDialog(const GpgKey& key, UIDArgsListPtr uid,
 
   this->setLayout(layout);
   this->setModal(true);
-  this->setWindowTitle(tr("Sign For Key's UID(s)"));
+  this->setWindowTitle(_("Sign For Key's UID(s)"));
   this->adjustSize();
 
   setAttribute(Qt::WA_DeleteOnClose, true);
@@ -114,15 +114,13 @@ void KeyUIDSignDialog::slotSignKey(bool clicked) {
     // Sign For mKey
     if (!GpgKeyManager::GetInstance().signKey(mKey, *keys, uid, expires)) {
       QMessageBox::critical(
-          nullptr, tr("Unsuccessful Operation"),
-          QString(tr("Signature operation failed for UID ") + "%1")
-              .arg(uid.c_str()));
+          nullptr, _("Unsuccessful Operation"),
+          QString(_("Signature operation failed for UID %1")).arg(uid.c_str()));
     }
   }
 
-  QMessageBox::information(
-      nullptr, tr("Operation Complete"),
-      tr("The signature operation of the UID is complete"));
+  QMessageBox::information(nullptr, _("Operation Complete"),
+                           _("The signature operation of the UID is complete"));
   this->close();
   emit signalKeyUIDSignUpdate();
 }
diff --git a/src/ui/keypair_details/KeyUIDSignDialog.h b/src/ui/keypair_details/KeyUIDSignDialog.h
index 1bd68416..8a83977a 100644
--- a/src/ui/keypair_details/KeyUIDSignDialog.h
+++ b/src/ui/keypair_details/KeyUIDSignDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/main_window/MainWindowFileSlotFunction.cpp b/src/ui/main_window/MainWindowFileSlotFunction.cpp
index 2edac85d..32fae92e 100644
--- a/src/ui/main_window/MainWindowFileSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowFileSlotFunction.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -33,18 +33,18 @@ bool file_pre_check(QWidget* parent, const QString& path) {
   QFileInfo file_info(path);
   QFileInfo path_info(file_info.absolutePath());
   if (!file_info.isFile()) {
-    QMessageBox::critical(parent, QApplication::tr("Error"),
-                          QApplication::tr("Select a file before doing it."));
+    QMessageBox::critical(parent, _("Error"),
+                          _("Select a file before doing it."));
     return false;
   }
   if (!file_info.isReadable()) {
-    QMessageBox::critical(parent, QApplication::tr("Error"),
-                          QApplication::tr("No permission to read this file."));
+    QMessageBox::critical(parent, _("Error"),
+                          _("No permission to read this file."));
     return false;
   }
   if (!path_info.isWritable()) {
-    QMessageBox::critical(parent, QApplication::tr("Error"),
-                          QApplication::tr("No permission to create file."));
+    QMessageBox::critical(parent, _("Error"),
+                          _("No permission to create file."));
     return false;
   }
   return true;
@@ -58,8 +58,8 @@ void MainWindow::slotFileEncrypt() {
 
   if (QFile::exists(path + ".asc")) {
     auto ret = QMessageBox::warning(
-        this, tr("Warning"),
-        tr("The target file already exists, do you need to overwrite it?"),
+        this, _("Warning"),
+        _("The target file already exists, do you need to overwrite it?"),
         QMessageBox::Ok | QMessageBox::Cancel);
 
     if (ret == QMessageBox::Cancel) return;
@@ -68,17 +68,18 @@ void MainWindow::slotFileEncrypt() {
   auto key_ids = mKeyList->getChecked();
   auto keys = GpgKeyGetter::GetInstance().GetKeys(key_ids);
   if (keys->empty()) {
-    QMessageBox::critical(this, tr("No Key Selected"), tr("No Key Selected"));
+    QMessageBox::critical(this, _("No Key Selected"), _("No Key Selected"));
     return;
   }
 
   for (const auto& key : *keys) {
     if (!key.CanEncrActual()) {
       QMessageBox::information(
-          this, tr("Invalid Operation"),
-          tr("The selected key contains a key that does not actually have a "
-             "encrypt usage.<br/>") +
-              tr("<br/>For example the Following Key: <br/>") +
+          this, _("Invalid Operation"),
+          QString(
+              _("The selected key contains a key that does not actually have a "
+                "encrypt usage.")) +
+              "<br/><br/>" + _("For example the Following Key:") + " <br/>" +
               QString::fromStdString(key.uids()->front().uid()));
       return;
     }
@@ -87,7 +88,7 @@ void MainWindow::slotFileEncrypt() {
   GpgEncrResult result = nullptr;
   GpgError error;
   bool if_error = false;
-  process_operation(this, tr("Encrypting").toStdString(), [&]() {
+  process_operation(this, _("Encrypting"), [&]() {
     try {
       error = GpgFileOpera::EncryptFile(std::move(*keys), path.toStdString(),
                                         result);
@@ -102,8 +103,8 @@ void MainWindow::slotFileEncrypt() {
     process_result_analyse(edit, infoBoard, resultAnalyse);
     fileTreeView->update();
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 }
@@ -125,8 +126,8 @@ void MainWindow::slotFileDecrypt() {
 
   if (QFile::exists(outFileName)) {
     auto ret = QMessageBox::warning(
-        this, tr("Warning"),
-        tr("The target file already exists, do you need to overwrite it?"),
+        this, _("Warning"),
+        _("The target file already exists, do you need to overwrite it?"),
         QMessageBox::Ok | QMessageBox::Cancel);
 
     if (ret == QMessageBox::Cancel) return;
@@ -135,7 +136,7 @@ void MainWindow::slotFileDecrypt() {
   GpgDecrResult result = nullptr;
   gpgme_error_t error;
   bool if_error = false;
-  process_operation(this, tr("Decrypting").toStdString(), [&]() {
+  process_operation(this, _("Decrypting"), [&]() {
     try {
       error = GpgFileOpera::DecryptFile(path.toStdString(), result);
     } catch (const std::runtime_error& e) {
@@ -150,8 +151,8 @@ void MainWindow::slotFileDecrypt() {
 
     fileTreeView->update();
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 }
@@ -164,8 +165,8 @@ void MainWindow::slotFileSign() {
 
   if (QFile::exists(path + ".sig")) {
     auto ret = QMessageBox::warning(
-        this, tr("Warning"),
-        tr("The target file already exists, do you need to overwrite it?"),
+        this, _("Warning"),
+        _("The target file already exists, do you need to overwrite it?"),
         QMessageBox::Ok | QMessageBox::Cancel);
 
     if (ret == QMessageBox::Cancel) return;
@@ -175,17 +176,17 @@ void MainWindow::slotFileSign() {
   auto keys = GpgKeyGetter::GetInstance().GetKeys(key_ids);
 
   if (keys->empty()) {
-    QMessageBox::critical(this, tr("No Key Selected"), tr("No Key Selected"));
+    QMessageBox::critical(this, _("No Key Selected"), _("No Key Selected"));
     return;
   }
 
   for (const auto& key : *keys) {
     if (!key.CanSignActual()) {
       QMessageBox::information(
-          this, tr("Invalid Operation"),
-          tr("The selected key contains a key that does not actually have a "
-             "sign usage.<br/>") +
-              tr("<br/>For example the Following Key: <br/>") +
+          this, _("Invalid Operation"),
+          QString(_("The selected key contains a key that does not actually "
+                    "have a sign usage.")) +
+              "<br/><br/>" + _("for example the Following Key:") + " <br/>" +
               QString::fromStdString(key.uids()->front().uid()));
       return;
     }
@@ -195,7 +196,7 @@ void MainWindow::slotFileSign() {
   gpgme_error_t error;
   bool if_error = false;
 
-  process_operation(this, tr("Signing").toStdString(), [&]() {
+  process_operation(this, _("Signing"), [&]() {
     try {
       error =
           GpgFileOpera::SignFile(std::move(*keys), path.toStdString(), result);
@@ -212,8 +213,8 @@ void MainWindow::slotFileSign() {
     fileTreeView->update();
 
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 
@@ -244,26 +245,26 @@ void MainWindow::slotFileVerify() {
 
   if (!dataFileInfo.isFile() || !signFileInfo.isFile()) {
     QMessageBox::critical(
-        this, tr("Error"),
-        tr("Please select the appropriate target file or signature file. "
-           "Ensure that both are in this directory."));
+        this, _("Error"),
+        _("Please select the appropriate target file or signature file. "
+          "Ensure that both are in this directory."));
     return;
   }
   if (!dataFileInfo.isReadable()) {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("No permission to read target file."));
+    QMessageBox::critical(this, _("Error"),
+                          _("No permission to read target file."));
     return;
   }
   if (!fileInfo.isReadable()) {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("No permission to read signature file."));
+    QMessageBox::critical(this, _("Error"),
+                          _("No permission to read signature file."));
     return;
   }
 
   GpgVerifyResult result = nullptr;
   gpgme_error_t error;
   bool if_error = false;
-  process_operation(this, tr("Verifying").toStdString(), [&]() {
+  process_operation(this, _("Verifying"), [&]() {
     try {
       error = GpgFileOpera::VerifyFile(dataFilePath.toStdString(), result);
     } catch (const std::runtime_error& e) {
@@ -286,8 +287,8 @@ void MainWindow::slotFileVerify() {
 
     fileTreeView->update();
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 }
@@ -300,8 +301,8 @@ void MainWindow::slotFileEncryptSign() {
 
   if (QFile::exists(path + ".gpg")) {
     auto ret = QMessageBox::warning(
-        this, tr("Warning"),
-        tr("The target file already exists, do you need to overwrite it?"),
+        this, _("Warning"),
+        _("The target file already exists, do you need to overwrite it?"),
         QMessageBox::Ok | QMessageBox::Cancel);
 
     if (ret == QMessageBox::Cancel) return;
@@ -311,7 +312,7 @@ void MainWindow::slotFileEncryptSign() {
   auto keys = GpgKeyGetter::GetInstance().GetKeys(key_ids);
 
   if (keys->empty()) {
-    QMessageBox::critical(this, tr("No Key Selected"), tr("No Key Selected"));
+    QMessageBox::critical(this, _("No Key Selected"), _("No Key Selected"));
     return;
   }
 
@@ -323,10 +324,11 @@ void MainWindow::slotFileEncryptSign() {
 
     if (!key_can_sign && !key_can_encr) {
       QMessageBox::critical(
-          nullptr, tr("Invalid KeyPair"),
-          tr("The selected keypair cannot be used for signing and encryption "
-             "at the same time.<br/>") +
-              tr("<br/>For example the Following Key: <br/>") +
+          nullptr, _("Invalid KeyPair"),
+          QString(_(
+              "The selected keypair cannot be used for signing and encryption "
+              "at the same time.")) +
+              "<br/><br/>" + _("For example the Following Key:") + " <br/>" +
               QString::fromStdString(key.uids()->front().uid()));
       return;
     }
@@ -336,16 +338,16 @@ void MainWindow::slotFileEncryptSign() {
   }
 
   if (!can_encr) {
-    QMessageBox::critical(nullptr, tr("Incomplete Operation"),
-                          tr("None of the selected key pairs can provide the "
-                             "encryption function."));
+    QMessageBox::critical(nullptr, _("Incomplete Operation"),
+                          _("None of the selected key pairs can provide the "
+                            "encryption function."));
     return;
   }
 
   if (!can_sign) {
-    QMessageBox::warning(nullptr, tr("Incomplete Operation"),
-                         tr("None of the selected key pairs can provide the "
-                            "signature function."));
+    QMessageBox::warning(nullptr, _("Incomplete Operation"),
+                         _("None of the selected key pairs can provide the "
+                           "signature function."));
   }
 
   GpgEncrResult encr_result = nullptr;
@@ -354,7 +356,7 @@ void MainWindow::slotFileEncryptSign() {
   gpgme_error_t error;
   bool if_error = false;
 
-  process_operation(this, tr("Encrypting and Signing").toStdString(), [&]() {
+  process_operation(this, _("Encrypting and Signing"), [&]() {
     try {
       error = GpgFileOpera::EncryptSignFile(
           std::move(*keys), path.toStdString(), encr_result, sign_result);
@@ -373,8 +375,8 @@ void MainWindow::slotFileEncryptSign() {
     fileTreeView->update();
 
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 }
@@ -398,7 +400,7 @@ void MainWindow::slotFileDecryptVerify() {
   GpgVerifyResult v_result = nullptr;
   gpgme_error_t error;
   bool if_error = false;
-  process_operation(this, tr("Decrypting and Verifying").toStdString(), [&]() {
+  process_operation(this, _("Decrypting and Verifying"), [&]() {
     try {
       error = GpgFileOpera::DecryptVerifyFile(path.toStdString(), d_result,
                                               v_result);
@@ -426,8 +428,8 @@ void MainWindow::slotFileDecryptVerify() {
 
     fileTreeView->update();
   } else {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("An error occurred during operation."));
+    QMessageBox::critical(this, _("Error"),
+                          _("An error occurred during operation."));
     return;
   }
 }
diff --git a/src/ui/main_window/MainWindowServerSlotFunction.cpp b/src/ui/main_window/MainWindowServerSlotFunction.cpp
index 6266efda..17491db7 100644
--- a/src/ui/main_window/MainWindowServerSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowServerSlotFunction.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -45,10 +45,10 @@ QString MainWindow::getCryptText(const QString& shortenCryptoText) {
 
   GpgKey key = mCtx->getKeyRefById(ownKeyId);
   if (!key.good) {
-    QMessageBox::critical(this, tr("Invalid Own Key"),
-                          tr("Own Key can not be use to do any operation. "
-                             "Please go to the setting interface to select an "
-                             "OwnKey and get a ServiceToken."));
+    QMessageBox::critical(this, _("Invalid Own Key"),
+                          _("Own Key can not be use to do any operation. "
+                            "Please go to the setting interface to select an "
+                            "OwnKey and get a ServiceToken."));
     return {};
   }
 
@@ -57,8 +57,8 @@ QString MainWindow::getCryptText(const QString& shortenCryptoText) {
   QString serviceToken = settings.value("general/serviceToken").toString();
   if (serviceToken.isEmpty() || !utils->checkServiceTokenFormat(serviceToken)) {
     QMessageBox::critical(
-        this, tr("Error"),
-        tr("Please obtain a Service Token from the server in the settings."));
+        this, _("Error"),
+        _("Please obtain a Service Token from the server in the settings."));
     return {};
   }
 
@@ -95,11 +95,10 @@ QString MainWindow::getCryptText(const QString& shortenCryptoText) {
 
   QNetworkReply* reply = utils->getNetworkManager().post(request, postData);
 
-  auto dialog = new WaitingDialog(tr("Getting Cpt From Server"), this);
+  auto dialog = new WaitingDialog(_("Getting Cpt From Server"), this);
   dialog->show();
 
-  while (reply->isRunning())
-    QApplication::processEvents();
+  while (reply->isRunning()) QApplication::processEvents();
 
   dialog->close();
 
@@ -117,9 +116,9 @@ QString MainWindow::getCryptText(const QString& shortenCryptoText) {
     if (!utils->checkDataValueStr("cryptoText") ||
         !utils->checkDataValueStr("sha") ||
         !utils->checkDataValueStr("serviceToken")) {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("The communication content with the server does "
-                               "not meet the requirements"));
+      QMessageBox::critical(this, _("Error"),
+                            _("The communication content with the server does "
+                              "not meet the requirements"));
       return {};
     }
 
@@ -134,7 +133,7 @@ QString MainWindow::getCryptText(const QString& shortenCryptoText) {
         serviceToken == serviceTokenFromServer) {
       return cryptoText;
     } else
-      QMessageBox::critical(this, tr("Error"), tr("Invalid short ciphertext"));
+      QMessageBox::critical(this, _("Error"), _("Invalid short ciphertext"));
 
     return {};
   }
@@ -156,8 +155,8 @@ void MainWindow::shortenCryptText() {
 
   if (serviceToken.isEmpty() || !utils->checkServiceTokenFormat(serviceToken)) {
     QMessageBox::critical(
-        this, tr("Invalid Service Token"),
-        tr("Please go to the setting interface to get a ServiceToken."));
+        this, _("Invalid Service Token"),
+        _("Please go to the setting interface to get a ServiceToken."));
     return;
   }
 
@@ -167,8 +166,8 @@ void MainWindow::shortenCryptText() {
 
   GpgKey key = mCtx->getKeyRefById(ownKeyId);
   if (!key.good) {
-    QMessageBox::critical(this, tr("Invalid Own Key"),
-                          tr("Own Key can not be use to do any operation."));
+    QMessageBox::critical(this, _("Invalid Own Key"),
+                          _("Own Key can not be use to do any operation."));
     return;
   }
 
@@ -217,10 +216,9 @@ void MainWindow::shortenCryptText() {
 
   QNetworkReply* reply = networkAccessManager->post(request, postData);
 
-  auto* dialog = new WaitingDialog(tr("Getting Scpt From Server"), this);
+  auto* dialog = new WaitingDialog(_("Getting Scpt From Server"), this);
   dialog->show();
-  while (reply->isRunning())
-    QApplication::processEvents();
+  while (reply->isRunning()) QApplication::processEvents();
   dialog->close();
 
   if (utils->checkServerReply(reply->readAll().constData())) {
@@ -233,9 +231,9 @@ void MainWindow::shortenCryptText() {
 
     if (!utils->checkDataValueStr("shortenText") ||
         !utils->checkDataValueStr("md5")) {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("The communication content with the server does "
-                               "not meet the requirements"));
+      QMessageBox::critical(this, _("Error"),
+                            _("The communication content with the server does "
+                              "not meet the requirements"));
       return;
     }
 
@@ -246,14 +244,14 @@ void MainWindow::shortenCryptText() {
     if (md5_generator.result().toHex() == utils->getDataValueStr("md5")) {
       auto* dialog =
           new ShowCopyDialog(shortenText,
-                             tr("Notice: Use Decrypt & Verify operation to "
-                                "decrypt this short crypto text."),
+                             _("Notice: Use Decrypt & Verify operation to "
+                               "decrypt this short crypto text."),
                              this);
       dialog->show();
     } else {
       QMessageBox::critical(
-          this, tr("Error"),
-          tr("There is a problem with the communication with the server"));
+          this, _("Error"),
+          _("There is a problem with the communication with the server"));
       return;
     }
   }
diff --git a/src/ui/main_window/MainWindowSlotFunction.cpp b/src/ui/main_window/MainWindowSlotFunction.cpp
index 37150160..0f7bdb26 100644
--- a/src/ui/main_window/MainWindowSlotFunction.cpp
+++ b/src/ui/main_window/MainWindowSlotFunction.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -52,8 +52,8 @@ void MainWindow::slotEncrypt() {
     auto key_ids = mKeyList->getChecked();
 
     if (key_ids->empty()) {
-      QMessageBox::critical(nullptr, tr("No Key Selected"),
-                            tr("No Key Selected"));
+      QMessageBox::critical(nullptr, _("No Key Selected"),
+                            _("No Key Selected"));
       return;
     }
 
@@ -62,10 +62,11 @@ void MainWindow::slotEncrypt() {
     for (const auto& key : *keys) {
       if (!key.CanEncrActual()) {
         QMessageBox::information(
-            nullptr, tr("Invalid Operation"),
-            tr("The selected key contains a key that does not actually have a "
-               "encrypt usage.<br/>") +
-                tr("<br/>For example the Following Key: <br/>") +
+            nullptr, _("Invalid Operation"),
+            QString(_(
+                "The selected key contains a key that does not actually have a "
+                "encrypt usage.")) +
+                "<br/><br/>" + _("For example the Following Key:") + " <br/>" +
                 QString::fromStdString(key.uids()->front().uid()));
         return;
       }
@@ -76,7 +77,7 @@ void MainWindow::slotEncrypt() {
     GpgEncrResult result = nullptr;
     GpgError error;
     bool if_error = false;
-    process_operation(this, tr("Encrypting").toStdString(), [&]() {
+    process_operation(this, _("Encrypting"), [&]() {
       try {
         auto buffer = edit->curTextPage()->toPlainText().toUtf8().toStdString();
         error = GpgFrontend::BasicOperator::GetInstance().Encrypt(
@@ -100,17 +101,17 @@ void MainWindow::slotEncrypt() {
           if (settings.value("sendMail/enable", false).toBool())
             new SendMailDialog(edit->curTextPage()->toPlainText(), this);
           else {
-            QMessageBox::warning(nullptr, tr("Function Disabled"),
-                                 tr("Please go to the settings interface to "
-                                    "enable and configure this function."));
+            QMessageBox::warning(nullptr, _("Function Disabled"),
+                                 _("Please go to the settings interface to "
+                                   "enable and configure this function."));
           }
         });
       }
 #endif
 
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
 
@@ -126,7 +127,7 @@ void MainWindow::slotSign() {
     auto key_ids = mKeyList->getPrivateChecked();
 
     if (key_ids->empty()) {
-      QMessageBox::critical(this, tr("No Key Selected"), tr("No Key Selected"));
+      QMessageBox::critical(this, _("No Key Selected"), _("No Key Selected"));
       return;
     }
 
@@ -134,11 +135,12 @@ void MainWindow::slotSign() {
     for (const auto& key : *keys) {
       if (!key.CanSignActual()) {
         QMessageBox::information(
-            this, tr("Invalid Operation"),
-            tr("The selected key contains a key that does not actually have a "
-               "signature usage.<br/>") +
-                tr("<br/>For example the Following Key: <br/>") +
-                QString::fromStdString(key.uids()->front().uid()));
+            this, _("Invalid Operation"),
+            QString(_(
+                "The selected key contains a key that does not actually have a "
+                "signature usage.")) +
+                "<br/><br/>" + _("For example the Following Key:") + "<br/>" +
+                key.uids()->front().uid().c_str());
         return;
       }
     }
@@ -149,7 +151,7 @@ void MainWindow::slotSign() {
     gpgme_error_t error;
     bool if_error = false;
 
-    process_operation(this, tr("Signing").toStdString(), [&]() {
+    process_operation(this, _("Signing"), [&]() {
       try {
         auto buffer = edit->curTextPage()->toPlainText().toUtf8().toStdString();
         error = GpgFrontend::BasicOperator::GetInstance().Sign(
@@ -165,8 +167,8 @@ void MainWindow::slotSign() {
       process_result_analyse(edit, infoBoard, resultAnalyse);
       edit->slotFillTextEditWithText(QString::fromStdString(*tmp));
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
   } else if (edit->slotCurPageFileTreeView() != nullptr) {
@@ -184,15 +186,15 @@ void MainWindow::slotDecrypt() {
     if (text.trimmed().startsWith(
             GpgConstants::GPG_FRONTEND_SHORT_CRYPTO_HEAD)) {
       QMessageBox::critical(
-          this, tr("Notice"),
-          tr("Short Crypto Text only supports Decrypt & Verify."));
+          this, _("Notice"),
+          _("Short Crypto Text only supports Decrypt & Verify."));
       return;
     }
 
     GpgDecrResult result = nullptr;
     gpgme_error_t error;
     bool if_error = false;
-    process_operation(this, tr("Decrypting").toStdString(), [&]() {
+    process_operation(this, _("Decrypting"), [&]() {
       try {
         auto buffer = text.toStdString();
         error = GpgFrontend::BasicOperator::GetInstance().Decrypt(
@@ -210,8 +212,8 @@ void MainWindow::slotDecrypt() {
       if (gpgme_err_code(error) == GPG_ERR_NO_ERROR)
         edit->slotFillTextEditWithText(QString::fromStdString(*decrypted));
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
   } else if (edit->slotCurPageFileTreeView() != nullptr) {
@@ -244,7 +246,7 @@ void MainWindow::slotVerify() {
     GpgVerifyResult result = nullptr;
     GpgError error;
     bool if_error = false;
-    process_operation(this, tr("Verifying").toStdString(), [&]() {
+    process_operation(this, _("Verifying"), [&]() {
       try {
         auto buffer = text.toStdString();
         error = GpgFrontend::BasicOperator::GetInstance().Verify(
@@ -268,8 +270,8 @@ void MainWindow::slotVerify() {
       //    }
 
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
   } else if (edit->slotCurPageFileTreeView() != nullptr) {
@@ -284,8 +286,8 @@ void MainWindow::slotEncryptSign() {
     auto key_ids = mKeyList->getChecked();
 
     if (key_ids->empty()) {
-      QMessageBox::critical(nullptr, tr("No Key Selected"),
-                            tr("No Key Selected"));
+      QMessageBox::critical(nullptr, _("No Key Selected"),
+                            _("No Key Selected"));
       return;
     }
 
@@ -296,9 +298,9 @@ void MainWindow::slotEncryptSign() {
 
       if (!key_can_encrypt) {
         QMessageBox::critical(
-            nullptr, tr("Invalid KeyPair"),
-            tr("The selected keypair cannot be used for encryption.<br/>") +
-                tr("<br/>For example the Following Key: <br/>") +
+            nullptr, _("Invalid KeyPair"),
+            QString(_("The selected keypair cannot be used for encryption.")) +
+                "<br/><br/>" + _("For example the Following Key:") + " <br/>" +
                 QString::fromStdString(key.uids()->front().uid()));
         return;
       }
@@ -326,7 +328,7 @@ void MainWindow::slotEncryptSign() {
     bool if_error = false;
 
     auto tmp = std::make_unique<ByteArray>();
-    process_operation(this, tr("Encrypting and Signing").toStdString(), [&]() {
+    process_operation(this, _("Encrypting and Signing"), [&]() {
       try {
         auto buffer = edit->curTextPage()->toPlainText().toUtf8().toStdString();
         error = GpgFrontend::BasicOperator::GetInstance().EncryptSign(
@@ -344,11 +346,11 @@ void MainWindow::slotEncryptSign() {
         pubkeyUploader.start();
         if (!pubkeyUploader.result()) {
           QMessageBox::warning(
-              nullptr, tr("Automatic Key Exchange Warning"),
-              tr("Part of the automatic key exchange failed, "
-                 "which may be related to your key.") +
-                  tr("If possible, try to use the RSA algorithm "
-                     "compatible with the server for signing."));
+              nullptr, _("Automatic Key Exchange Warning"),
+              _("Part of the automatic key exchange failed, "
+                "which may be related to your key.") +
+                  _("If possible, try to use the RSA algorithm "
+                    "compatible with the server for signing."));
         }
       }
 #endif
@@ -366,9 +368,9 @@ void MainWindow::slotEncryptSign() {
         if (settings.value("sendMail/enable", false).toBool())
           new SendMailDialog(edit->curTextPage()->toPlainText(), this);
         else {
-          QMessageBox::warning(nullptr, tr("Function Disabled"),
-                               tr("Please go to the settings interface to "
-                                  "enable and configure this function."));
+          QMessageBox::warning(nullptr, _("Function Disabled"),
+                               _("Please go to the settings interface to "
+                                 "enable and configure this function."));
         }
       });
 #endif
@@ -376,9 +378,9 @@ void MainWindow::slotEncryptSign() {
 #ifdef ADVANCE_SUPPORT
       infoBoard->addOptionalAction("Shorten Ciphertext", [this]() {
         if (settings.value("general/serviceToken").toString().isEmpty())
-          QMessageBox::warning(nullptr, tr("Service Token Empty"),
-                               tr("Please go to the settings interface to set "
-                                  "Own Key and get Service Token."));
+          QMessageBox::warning(nullptr, _("Service Token Empty"),
+                               _("Please go to the settings interface to set "
+                                 "Own Key and get Service Token."));
         else {
           shortenCryptText();
         }
@@ -386,8 +388,8 @@ void MainWindow::slotEncryptSign() {
 #endif
 
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
   } else if (edit->slotCurPageFileTreeView() != nullptr) {
@@ -432,16 +434,15 @@ void MainWindow::slotDecryptVerify() {
     }
 #endif
     auto decrypted = std::make_unique<ByteArray>();
-    process_operation(this, tr("Decrypting and Verifying").toStdString(),
-                      [&]() {
-                        try {
-                          auto buffer = text.toStdString();
-                          error = BasicOperator::GetInstance().DecryptVerify(
-                              buffer, decrypted, d_result, v_result);
-                        } catch (const std::runtime_error& e) {
-                          if_error = true;
-                        }
-                      });
+    process_operation(this, _("Decrypting and Verifying"), [&]() {
+      try {
+        auto buffer = text.toStdString();
+        error = BasicOperator::GetInstance().DecryptVerify(buffer, decrypted,
+                                                           d_result, v_result);
+      } catch (const std::runtime_error& e) {
+        if_error = true;
+      }
+    });
 
     if (!if_error) {
       infoBoard->associateFileTreeView(edit->curFilePage());
@@ -463,8 +464,8 @@ void MainWindow::slotDecryptVerify() {
       //                });
       //          }
     } else {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("An error occurred during operation."));
+      QMessageBox::critical(this, _("Error"),
+                            _("An error occurred during operation."));
       return;
     }
 
@@ -494,7 +495,7 @@ void MainWindow::slotCopyMailAddressToClipboard() {
 
   auto key = GpgKeyGetter::GetInstance().GetKey(key_ids->front());
   if (!key.good()) {
-    QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+    QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
     return;
   }
   QClipboard* cb = QApplication::clipboard();
@@ -509,7 +510,7 @@ void MainWindow::slotShowKeyDetails() {
   if (key.good()) {
     new KeyDetailsDialog(key, this);
   } else {
-    QMessageBox::critical(nullptr, tr("Error"), tr("Key Not Found."));
+    QMessageBox::critical(nullptr, _("Error"), _("Key Not Found."));
   }
 }
 
@@ -534,21 +535,24 @@ void MainWindow::slotOpenFile(QString& path) { edit->slotOpenFile(path); }
 void MainWindow::slotVersionUpgrade(const QString& currentVersion,
                                     const QString& latestVersion) {
   if (currentVersion < latestVersion) {
-    QMessageBox::warning(this, tr("Outdated Version"),
-                         tr("This version(%1) is out of date, please update "
-                            "the latest version in time. ")
-                                 .arg(currentVersion) +
-                             tr("You can download the latest version(%1) on "
-                                "Github Releases Page.<br/>")
-                                 .arg(latestVersion));
+    QMessageBox::warning(
+        this, _("Outdated Version"),
+        QString(_("This version(%1) is out of date, please update "
+                  "the latest version in time. "))
+                .arg(currentVersion) +
+            QString(_("You can download the latest version(%1) on "
+                      "Github Releases Page.<br/>"))
+                .arg(latestVersion));
   } else if (currentVersion > latestVersion) {
     QMessageBox::warning(
-        this, tr("Unreleased Version"),
-        tr("This version(%1) has not been officially released and is not "
-           "recommended for use in a production environment. <br/>")
+        this, _("Unreleased Version"),
+        QString(
+            _("This version(%1) has not been officially released and is not "
+              "recommended for use in a production environment. <br/>"))
                 .arg(currentVersion) +
-            tr("You can download the latest version(%1) on Github Releases "
-               "Page.<br/>")
+            QString(
+                _("You can download the latest version(%1) on Github Releases "
+                  "Page.<br/>"))
                 .arg(latestVersion));
   }
 }
diff --git a/src/ui/main_window/MainWindowSlotUI.cpp b/src/ui/main_window/MainWindowSlotUI.cpp
index 7310bd1c..312364e2 100644
--- a/src/ui/main_window/MainWindowSlotUI.cpp
+++ b/src/ui/main_window/MainWindowSlotUI.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -53,10 +53,10 @@ void MainWindow::slotStartWizard() {
 //   if (filenum > 0) {
 //     QString statusText;
 //     if (filenum == 1) {
-//       statusText = tr("There is one unencrypted file in attachment folder");
+//       statusText = _("There is one unencrypted file in attachment folder");
 //     } else {
-//       statusText = tr("There are ") + QString::number(filenum) +
-//                    tr(" unencrypted files in attachment folder");
+//       statusText = _("There are ") + QString::number(filenum) +
+//                    _(" unencrypted files in attachment folder");
 //     }
 //     statusBarIcon->setStatusTip(statusText);
 //     statusBarIcon->show();
diff --git a/src/ui/main_window/MainWindowUI.cpp b/src/ui/main_window/MainWindowUI.cpp
index cf5d1172..08a9e215 100644
--- a/src/ui/main_window/MainWindowUI.cpp
+++ b/src/ui/main_window/MainWindowUI.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -29,256 +29,255 @@ namespace GpgFrontend::UI {
 void MainWindow::createActions() {
   /* Main Menu
    */
-  newTabAct = new QAction(tr("&New"), this);
+  newTabAct = new QAction(_("New"), this);
   newTabAct->setIcon(QIcon(":misc_doc.png"));
   QList<QKeySequence> newTabActShortcutList;
   newTabActShortcutList.append(QKeySequence(Qt::CTRL + Qt::Key_N));
   newTabActShortcutList.append(QKeySequence(Qt::CTRL + Qt::Key_T));
   newTabAct->setShortcuts(newTabActShortcutList);
-  newTabAct->setToolTip(tr("Open a new file"));
+  newTabAct->setToolTip(_("Open a new file"));
   connect(newTabAct, SIGNAL(triggered()), edit, SLOT(slotNewTab()));
 
-  openAct = new QAction(tr("&Open..."), this);
+  openAct = new QAction(_("Open..."), this);
   openAct->setIcon(QIcon(":fileopen.png"));
   openAct->setShortcut(QKeySequence::Open);
-  openAct->setToolTip(tr("Open an existing file"));
+  openAct->setToolTip(_("Open an existing file"));
   connect(openAct, SIGNAL(triggered()), edit, SLOT(slotOpen()));
 
-  browserAct = new QAction(tr("&Browser"), this);
+  browserAct = new QAction(_("Browser"), this);
   browserAct->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_B));
-  browserAct->setToolTip(tr("Open a file browser"));
+  browserAct->setToolTip(_("Open a file browser"));
   connect(browserAct, SIGNAL(triggered()), this, SLOT(slotOpenFileTab()));
 
-  saveAct = new QAction(tr("&Save"), this);
+  saveAct = new QAction(_("Save"), this);
   saveAct->setIcon(QIcon(":filesave.png"));
   saveAct->setShortcut(QKeySequence::Save);
-  saveAct->setToolTip(tr("Save the current File"));
+  saveAct->setToolTip(_("Save the current File"));
   connect(saveAct, SIGNAL(triggered()), edit, SLOT(slotSave()));
 
-  saveAsAct = new QAction(tr("Save &As") + "...", this);
+  saveAsAct = new QAction(QString(_("Save As")) + "...", this);
   saveAsAct->setIcon(QIcon(":filesaveas.png"));
   saveAsAct->setShortcut(QKeySequence::SaveAs);
-  saveAsAct->setToolTip(tr("Save the current File as..."));
+  saveAsAct->setToolTip(_("Save the current File as..."));
   connect(saveAsAct, SIGNAL(triggered()), edit, SLOT(slotSaveAs()));
 
-  printAct = new QAction(tr("&Print"), this);
+  printAct = new QAction(_("Print"), this);
   printAct->setIcon(QIcon(":fileprint.png"));
   printAct->setShortcut(QKeySequence::Print);
-  printAct->setToolTip(tr("Print Document"));
+  printAct->setToolTip(_("Print Document"));
   connect(printAct, SIGNAL(triggered()), edit, SLOT(slotPrint()));
 
-  closeTabAct = new QAction(tr("&Close"), this);
+  closeTabAct = new QAction(_("Close"), this);
   closeTabAct->setShortcut(QKeySequence::Close);
-  closeTabAct->setToolTip(tr("Close file"));
+  closeTabAct->setToolTip(_("Close file"));
   connect(closeTabAct, SIGNAL(triggered()), edit, SLOT(slotCloseTab()));
 
-  quitAct = new QAction(tr("&Quit"), this);
+  quitAct = new QAction(_("Quit"), this);
   quitAct->setShortcut(QKeySequence::Quit);
   quitAct->setIcon(QIcon(":exit.png"));
-  quitAct->setToolTip(tr("Quit Program"));
+  quitAct->setToolTip(_("Quit Program"));
   connect(quitAct, SIGNAL(triggered()), this, SLOT(close()));
 
   /* Edit Menu
    */
-  undoAct = new QAction(tr("&Undo"), this);
+  undoAct = new QAction(_("Undo"), this);
   undoAct->setShortcut(QKeySequence::Undo);
-  undoAct->setToolTip(tr("Undo Last Edit Action"));
+  undoAct->setToolTip(_("Undo Last Edit Action"));
   connect(undoAct, SIGNAL(triggered()), edit, SLOT(slotUndo()));
 
-  redoAct = new QAction(tr("&Redo"), this);
+  redoAct = new QAction(_("Redo"), this);
   redoAct->setShortcut(QKeySequence::Redo);
-  redoAct->setToolTip(tr("Redo Last Edit Action"));
+  redoAct->setToolTip(_("Redo Last Edit Action"));
   connect(redoAct, SIGNAL(triggered()), edit, SLOT(slotRedo()));
 
-  zoomInAct = new QAction(tr("Zoom In"), this);
+  zoomInAct = new QAction(_("Zoom In"), this);
   zoomInAct->setShortcut(QKeySequence::ZoomIn);
   connect(zoomInAct, SIGNAL(triggered()), edit, SLOT(slotZoomIn()));
 
-  zoomOutAct = new QAction(tr("Zoom Out"), this);
+  zoomOutAct = new QAction(_("Zoom Out"), this);
   zoomOutAct->setShortcut(QKeySequence::ZoomOut);
   connect(zoomOutAct, SIGNAL(triggered()), edit, SLOT(slotZoomOut()));
 
-  pasteAct = new QAction(tr("&Paste"), this);
+  pasteAct = new QAction(_("Paste"), this);
   pasteAct->setIcon(QIcon(":button_paste.png"));
   pasteAct->setShortcut(QKeySequence::Paste);
-  pasteAct->setToolTip(tr("Paste Text From Clipboard"));
+  pasteAct->setToolTip(_("Paste Text From Clipboard"));
   connect(pasteAct, SIGNAL(triggered()), edit, SLOT(slotPaste()));
 
-  cutAct = new QAction(tr("Cu&t"), this);
+  cutAct = new QAction(_("Cut"), this);
   cutAct->setIcon(QIcon(":button_cut.png"));
   cutAct->setShortcut(QKeySequence::Cut);
   cutAct->setToolTip(
-      tr("Cut the current selection's contents to the "
-         "clipboard"));
+      _("Cut the current selection's contents to the "
+        "clipboard"));
   connect(cutAct, SIGNAL(triggered()), edit, SLOT(slotCut()));
 
-  copyAct = new QAction(tr("&Copy"), this);
+  copyAct = new QAction(_("Copy"), this);
   copyAct->setIcon(QIcon(":button_copy.png"));
   copyAct->setShortcut(QKeySequence::Copy);
   copyAct->setToolTip(
-      tr("Copy the current selection's contents to the "
-         "clipboard"));
+      _("Copy the current selection's contents to the "
+        "clipboard"));
   connect(copyAct, SIGNAL(triggered()), edit, SLOT(slotCopy()));
 
-  quoteAct = new QAction(tr("&Quote"), this);
+  quoteAct = new QAction(_("Quote"), this);
   quoteAct->setIcon(QIcon(":quote.png"));
-  quoteAct->setToolTip(tr("Quote whole text"));
+  quoteAct->setToolTip(_("Quote whole text"));
   connect(quoteAct, SIGNAL(triggered()), edit, SLOT(slotQuote()));
 
-  selectAllAct = new QAction(tr("Select &All"), this);
+  selectAllAct = new QAction(_("Select All"), this);
   selectAllAct->setIcon(QIcon(":edit.png"));
   selectAllAct->setShortcut(QKeySequence::SelectAll);
-  selectAllAct->setToolTip(tr("Select the whole text"));
+  selectAllAct->setToolTip(_("Select the whole text"));
   connect(selectAllAct, SIGNAL(triggered()), edit, SLOT(slotSelectAll()));
 
-  findAct = new QAction(tr("&Find"), this);
+  findAct = new QAction(_("Find"), this);
   findAct->setShortcut(QKeySequence::Find);
-  findAct->setToolTip(tr("Find a word"));
+  findAct->setToolTip(_("Find a word"));
   connect(findAct, SIGNAL(triggered()), this, SLOT(slotFind()));
 
-  cleanDoubleLinebreaksAct = new QAction(tr("Remove &spacing"), this);
+  cleanDoubleLinebreaksAct = new QAction(_("Remove spacing"), this);
   cleanDoubleLinebreaksAct->setIcon(QIcon(":format-line-spacing-triple.png"));
   // cleanDoubleLineBreaksAct->setShortcut(QKeySequence::SelectAll);
   cleanDoubleLinebreaksAct->setToolTip(
-      tr("Remove double linebreaks, e.g. in pasted text from webmailer"));
+      _("Remove double linebreaks, e.g. in pasted text from Web Mailer"));
   connect(cleanDoubleLinebreaksAct, SIGNAL(triggered()), this,
           SLOT(slotCleanDoubleLinebreaks()));
 
-  openSettingsAct = new QAction(tr("Se&ttings"), this);
-  openSettingsAct->setToolTip(tr("Open settings dialog"));
+  openSettingsAct = new QAction(_("Settings"), this);
+  openSettingsAct->setToolTip(_("Open settings dialog"));
   openSettingsAct->setShortcut(QKeySequence::Preferences);
   connect(openSettingsAct, SIGNAL(triggered()), this,
           SLOT(slotOpenSettingsDialog()));
 
   /* Crypt Menu
    */
-  encryptAct = new QAction(tr("&Encrypt"), this);
+  encryptAct = new QAction(_("Encrypt"), this);
   encryptAct->setIcon(QIcon(":encrypted.png"));
   encryptAct->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_E));
-  encryptAct->setToolTip(tr("Encrypt Message"));
+  encryptAct->setToolTip(_("Encrypt Message"));
   connect(encryptAct, SIGNAL(triggered()), this, SLOT(slotEncrypt()));
 
-  encryptSignAct = new QAction(tr("&Encrypt &Sign"), this);
+  encryptSignAct = new QAction(_("Encrypt Sign"), this);
   encryptSignAct->setIcon(QIcon(":encrypted_signed.png"));
   encryptSignAct->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_E));
-  encryptSignAct->setToolTip(tr("Encrypt and Sign Message"));
+  encryptSignAct->setToolTip(_("Encrypt and Sign Message"));
   connect(encryptSignAct, SIGNAL(triggered()), this, SLOT(slotEncryptSign()));
 
-  decryptAct = new QAction(tr("&Decrypt"), this);
+  decryptAct = new QAction(_("Decrypt"), this);
   decryptAct->setIcon(QIcon(":decrypted.png"));
   decryptAct->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_D));
-  decryptAct->setToolTip(tr("Decrypt Message"));
+  decryptAct->setToolTip(_("Decrypt Message"));
   connect(decryptAct, SIGNAL(triggered()), this, SLOT(slotDecrypt()));
 
-  decryptVerifyAct = new QAction(tr("&Decrypt &Verify"), this);
+  decryptVerifyAct = new QAction(_("Decrypt Verify"), this);
   decryptVerifyAct->setIcon(QIcon(":decrypted_verified.png"));
   decryptVerifyAct->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_D));
-  decryptVerifyAct->setToolTip(tr("Decrypt and Verify Message"));
+  decryptVerifyAct->setToolTip(_("Decrypt and Verify Message"));
   connect(decryptVerifyAct, SIGNAL(triggered()), this,
           SLOT(slotDecryptVerify()));
 
   /*
    * File encryption submenu
    */
-  fileEncryptAct = new QAction(tr("&Encrypt File"), this);
-  fileEncryptAct->setToolTip(tr("Encrypt File"));
+  fileEncryptAct = new QAction(_("Encrypt File"), this);
+  fileEncryptAct->setToolTip(_("Encrypt File"));
   connect(fileEncryptAct, SIGNAL(triggered()), this,
           SLOT(slotFileEncryptCustom()));
 
-  fileDecryptAct = new QAction(tr("&Decrypt File"), this);
-  fileDecryptAct->setToolTip(tr("Decrypt File"));
+  fileDecryptAct = new QAction(_("Decrypt File"), this);
+  fileDecryptAct->setToolTip(_("Decrypt File"));
   connect(fileDecryptAct, SIGNAL(triggered()), this,
           SLOT(slotFileDecryptCustom()));
 
-  fileSignAct = new QAction(tr("&Sign File"), this);
-  fileSignAct->setToolTip(tr("Sign File"));
+  fileSignAct = new QAction(_("Sign File"), this);
+  fileSignAct->setToolTip(_("Sign File"));
   connect(fileSignAct, SIGNAL(triggered()), this, SLOT(slotFileSignCustom()));
 
-  fileVerifyAct = new QAction(tr("&Verify File"), this);
-  fileVerifyAct->setToolTip(tr("Verify File"));
+  fileVerifyAct = new QAction(_("Verify File"), this);
+  fileVerifyAct->setToolTip(_("Verify File"));
   connect(fileVerifyAct, SIGNAL(triggered()), this,
           SLOT(slotFileVerifyCustom()));
 
-  signAct = new QAction(tr("&Sign"), this);
+  signAct = new QAction(_("Sign"), this);
   signAct->setIcon(QIcon(":signature.png"));
   signAct->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_I));
-  signAct->setToolTip(tr("Sign Message"));
+  signAct->setToolTip(_("Sign Message"));
   connect(signAct, SIGNAL(triggered()), this, SLOT(slotSign()));
 
-  verifyAct = new QAction(tr("&Verify"), this);
+  verifyAct = new QAction(_("Verify"), this);
   verifyAct->setIcon(QIcon(":verify.png"));
   verifyAct->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_V));
-  verifyAct->setToolTip(tr("Verify Message"));
+  verifyAct->setToolTip(_("Verify Message"));
   connect(verifyAct, SIGNAL(triggered()), this, SLOT(slotVerify()));
 
   /* Key Menu
    */
 
-  importKeyFromEditAct = new QAction(tr("&Editor"), this);
+  importKeyFromEditAct = new QAction(_("Editor"), this);
   importKeyFromEditAct->setIcon(QIcon(":txt.png"));
-  importKeyFromEditAct->setToolTip(tr("Import New Key From Editor"));
+  importKeyFromEditAct->setToolTip(_("Import New Key From Editor"));
   connect(importKeyFromEditAct, SIGNAL(triggered()), this,
           SLOT(slotImportKeyFromEdit()));
 
-  openKeyManagementAct = new QAction(tr("Manage &Keys"), this);
+  openKeyManagementAct = new QAction(_("Manage Keys"), this);
   openKeyManagementAct->setIcon(QIcon(":keymgmt.png"));
-  openKeyManagementAct->setToolTip(tr("Open Keymanagement"));
+  openKeyManagementAct->setToolTip(_("Open Key Management"));
   connect(openKeyManagementAct, SIGNAL(triggered()), this,
           SLOT(slotOpenKeyManagement()));
 
   /*
    * About Menu
    */
-  aboutAct = new QAction(tr("&About"), this);
+  aboutAct = new QAction(_("About"), this);
   aboutAct->setIcon(QIcon(":help.png"));
-  aboutAct->setToolTip(tr("Show the application's About box"));
+  aboutAct->setToolTip(_("Show the application's About box"));
   connect(aboutAct, SIGNAL(triggered()), this, SLOT(slotAbout()));
 
   /*
    * Check Update Menu
    */
-  checkUpdateAct = new QAction(tr("&Check for Updates"), this);
+  checkUpdateAct = new QAction(_("Check for Updates"), this);
   checkUpdateAct->setIcon(QIcon(":help.png"));
-  checkUpdateAct->setToolTip(tr("Check for updates"));
+  checkUpdateAct->setToolTip(_("Check for updates"));
   connect(checkUpdateAct, SIGNAL(triggered()), this, SLOT(slotCheckUpdate()));
 
-  startWizardAct = new QAction(tr("Open &Wizard"), this);
-  startWizardAct->setToolTip(tr("Open the wizard"));
+  startWizardAct = new QAction(_("Open Wizard"), this);
+  startWizardAct->setToolTip(_("Open the wizard"));
   connect(startWizardAct, SIGNAL(triggered()), this, SLOT(slotStartWizard()));
 
   /* Popup-Menu-Action for KeyList
    */
   appendSelectedKeysAct =
-      new QAction(tr("Append Selected Key(s) To Text"), this);
+      new QAction(_("Append Selected Key(s) To Text"), this);
   appendSelectedKeysAct->setToolTip(
-      tr("Append The Selected Keys To Text in Editor"));
+      _("Append The Selected Keys To Text in Editor"));
   connect(appendSelectedKeysAct, SIGNAL(triggered()), this,
           SLOT(slotAppendSelectedKeys()));
 
-  copyMailAddressToClipboardAct = new QAction(tr("Copy Email"), this);
+  copyMailAddressToClipboardAct = new QAction(_("Copy Email"), this);
   copyMailAddressToClipboardAct->setToolTip(
-      tr("Copy selected Email to clipboard"));
+      _("Copy selected Email to clipboard"));
   connect(copyMailAddressToClipboardAct, SIGNAL(triggered()), this,
           SLOT(slotCopyMailAddressToClipboard()));
 
   // TODO: find central place for shared actions, to avoid code-duplication with
   // keymgmt.cpp
-  showKeyDetailsAct = new QAction(tr("Show Key Details"), this);
-  showKeyDetailsAct->setToolTip(tr("Show Details for this Key"));
+  showKeyDetailsAct = new QAction(_("Show Key Details"), this);
+  showKeyDetailsAct->setToolTip(_("Show Details for this Key"));
   connect(showKeyDetailsAct, SIGNAL(triggered()), this,
           SLOT(slotShowKeyDetails()));
 
   refreshKeysFromKeyserverAct =
-      new QAction(tr("Refresh Key From Key Server"), this);
+      new QAction(_("Refresh Key From Key Server"), this);
   refreshKeysFromKeyserverAct->setToolTip(
-      tr("Refresh key from default key server"));
+      _("Refresh key from default key server"));
   connect(refreshKeysFromKeyserverAct, SIGNAL(triggered()), this,
           SLOT(refreshKeysFromKeyserver()));
 
-  uploadKeyToServerAct =
-      new QAction(tr("Upload Public Key(s) To Server"), this);
+  uploadKeyToServerAct = new QAction(_("Upload Public Key(s) To Server"), this);
   uploadKeyToServerAct->setToolTip(
-      tr("Upload The Selected Public Keys To Server"));
+      _("Upload The Selected Public Keys To Server"));
   connect(uploadKeyToServerAct, SIGNAL(triggered()), this,
           SLOT(uploadKeyToServer()));
 
@@ -295,15 +294,15 @@ void MainWindow::createActions() {
           SLOT(slotSwitchTabDown()));
   this->addAction(switchTabDownAct);
 
-  cutPgpHeaderAct = new QAction(tr("Remove PGP Header"), this);
+  cutPgpHeaderAct = new QAction(_("Remove PGP Header"), this);
   connect(cutPgpHeaderAct, SIGNAL(triggered()), this, SLOT(slotCutPgpHeader()));
 
-  addPgpHeaderAct = new QAction(tr("Add PGP Header"), this);
+  addPgpHeaderAct = new QAction(_("Add PGP Header"), this);
   connect(addPgpHeaderAct, SIGNAL(triggered()), this, SLOT(slotAddPgpHeader()));
 }
 
 void MainWindow::createMenus() {
-  fileMenu = menuBar()->addMenu(tr("&File"));
+  fileMenu = menuBar()->addMenu(_("File"));
   fileMenu->addAction(newTabAct);
   fileMenu->addAction(browserAct);
   fileMenu->addAction(openAct);
@@ -316,7 +315,7 @@ void MainWindow::createMenus() {
   fileMenu->addAction(closeTabAct);
   fileMenu->addAction(quitAct);
 
-  editMenu = menuBar()->addMenu(tr("&Edit"));
+  editMenu = menuBar()->addMenu(_("Edit"));
   editMenu->addAction(undoAct);
   editMenu->addAction(redoAct);
   editMenu->addSeparator();
@@ -334,13 +333,13 @@ void MainWindow::createMenus() {
   editMenu->addSeparator();
   editMenu->addAction(openSettingsAct);
 
-  fileEncMenu = new QMenu(tr("&File..."));
+  fileEncMenu = new QMenu(_("File..."));
   fileEncMenu->addAction(fileEncryptAct);
   fileEncMenu->addAction(fileDecryptAct);
   fileEncMenu->addAction(fileSignAct);
   fileEncMenu->addAction(fileVerifyAct);
 
-  cryptMenu = menuBar()->addMenu(tr("&Crypt"));
+  cryptMenu = menuBar()->addMenu(_("Crypt"));
   cryptMenu->addAction(encryptAct);
   cryptMenu->addAction(encryptSignAct);
   cryptMenu->addAction(decryptAct);
@@ -351,8 +350,8 @@ void MainWindow::createMenus() {
   cryptMenu->addSeparator();
   cryptMenu->addMenu(fileEncMenu);
 
-  keyMenu = menuBar()->addMenu(tr("&Keys"));
-  importKeyMenu = keyMenu->addMenu(tr("&Import Key"));
+  keyMenu = menuBar()->addMenu(_("Keys"));
+  importKeyMenu = keyMenu->addMenu(_("Import Key"));
   importKeyMenu->setIcon(QIcon(":key_import.png"));
   importKeyMenu->addAction(keyMgmt->importKeyFromFileAct);
   importKeyMenu->addAction(importKeyFromEditAct);
@@ -361,7 +360,7 @@ void MainWindow::createMenus() {
   importKeyMenu->addAction(keyMgmt->importKeyFromKeyServerAct);
   keyMenu->addAction(openKeyManagementAct);
 
-  steganoMenu = menuBar()->addMenu(tr("&Steganography"));
+  steganoMenu = menuBar()->addMenu(_("Steganography"));
   steganoMenu->addAction(cutPgpHeaderAct);
   steganoMenu->addAction(addPgpHeaderAct);
 
@@ -372,9 +371,9 @@ void MainWindow::createMenus() {
   }
 #endif
 
-  viewMenu = menuBar()->addMenu(tr("&View"));
+  viewMenu = menuBar()->addMenu(_("View"));
 
-  helpMenu = menuBar()->addMenu(tr("&Help"));
+  helpMenu = menuBar()->addMenu(_("Help"));
   helpMenu->addAction(startWizardAct);
   helpMenu->addSeparator();
   helpMenu->addAction(checkUpdateAct);
@@ -382,7 +381,7 @@ void MainWindow::createMenus() {
 }
 
 void MainWindow::createToolBars() {
-  fileToolBar = addToolBar(tr("File"));
+  fileToolBar = addToolBar(_("File"));
   fileToolBar->setObjectName("fileToolBar");
   fileToolBar->addAction(newTabAct);
   fileToolBar->addAction(openAct);
@@ -390,7 +389,7 @@ void MainWindow::createToolBars() {
   fileToolBar->hide();
   viewMenu->addAction(fileToolBar->toggleViewAction());
 
-  cryptToolBar = addToolBar(tr("Crypt"));
+  cryptToolBar = addToolBar(_("Crypt"));
   cryptToolBar->setObjectName("cryptToolBar");
   cryptToolBar->addAction(encryptAct);
   cryptToolBar->addAction(encryptSignAct);
@@ -400,19 +399,19 @@ void MainWindow::createToolBars() {
   cryptToolBar->addAction(verifyAct);
   viewMenu->addAction(cryptToolBar->toggleViewAction());
 
-  keyToolBar = addToolBar(tr("Key"));
+  keyToolBar = addToolBar(_("Key"));
   keyToolBar->setObjectName("keyToolBar");
   keyToolBar->addAction(openKeyManagementAct);
   viewMenu->addAction(keyToolBar->toggleViewAction());
 
-  editToolBar = addToolBar(tr("Edit"));
+  editToolBar = addToolBar(_("Edit"));
   editToolBar->setObjectName("editToolBar");
   editToolBar->addAction(copyAct);
   editToolBar->addAction(pasteAct);
   editToolBar->addAction(selectAllAct);
   viewMenu->addAction(editToolBar->toggleViewAction());
 
-  specialEditToolBar = addToolBar(tr("Special Edit"));
+  specialEditToolBar = addToolBar(_("Special Edit"));
   specialEditToolBar->setObjectName("specialEditToolBar");
   specialEditToolBar->addAction(quoteAct);
   specialEditToolBar->addAction(cleanDoubleLinebreaksAct);
@@ -424,8 +423,8 @@ void MainWindow::createToolBars() {
   importButton->setMenu(importKeyMenu);
   importButton->setPopupMode(QToolButton::InstantPopup);
   importButton->setIcon(QIcon(":key_import.png"));
-  importButton->setToolTip(tr("Import key from..."));
-  importButton->setText(tr("Import key"));
+  importButton->setToolTip(_("Import key from..."));
+  importButton->setText(_("Import key"));
   keyToolBar->addWidget(importButton);
 
   // Add dropdown menu for file encryption/decryption to crypttoolbar
@@ -433,8 +432,8 @@ void MainWindow::createToolBars() {
   connect(fileEncButton, SIGNAL(clicked(bool)), this, SLOT(slotOpenFileTab()));
   fileEncButton->setPopupMode(QToolButton::InstantPopup);
   fileEncButton->setIcon(QIcon(":fileencryption.png"));
-  fileEncButton->setToolTip(tr("Browser to view and operate file"));
-  fileEncButton->setText(tr("Browser"));
+  fileEncButton->setToolTip(_("Browser to view and operate file"));
+  fileEncButton->setText(_("Browser"));
   fileToolBar->addWidget(fileEncButton);
 }
 
@@ -451,14 +450,14 @@ void MainWindow::createStatusBar() {
   statusBarIcon->setPixmap(*pixmap);
   statusBar()->insertPermanentWidget(0, statusBarIcon, 0);
   statusBarIcon->hide();
-  statusBar()->showMessage(tr("Ready"), 2000);
+  statusBar()->showMessage(_("Ready"), 2000);
   statusBarBox->setLayout(statusBarBoxLayout);
 }
 
 void MainWindow::createDockWindows() {
   /* KeyList-Dockwindow
    */
-  keyListDock = new QDockWidget(tr("Key ToolBox"), this);
+  keyListDock = new QDockWidget(_("Key ToolBox"), this);
   keyListDock->setObjectName("EncryptDock");
   keyListDock->setAllowedAreas(Qt::LeftDockWidgetArea |
                                Qt::RightDockWidgetArea);
@@ -467,7 +466,7 @@ void MainWindow::createDockWindows() {
   keyListDock->setWidget(mKeyList);
   viewMenu->addAction(keyListDock->toggleViewAction());
 
-  infoBoardDock = new QDockWidget(tr("Information Board"), this);
+  infoBoardDock = new QDockWidget(_("Information Board"), this);
   infoBoardDock->setObjectName("Information Board");
   infoBoardDock->setAllowedAreas(Qt::BottomDockWidgetArea);
   addDockWidget(Qt::BottomDockWidgetArea, infoBoardDock);
diff --git a/src/ui/settings/GlobalSettingStation.cpp b/src/ui/settings/GlobalSettingStation.cpp
index 5d292446..3e229091 100644
--- a/src/ui/settings/GlobalSettingStation.cpp
+++ b/src/ui/settings/GlobalSettingStation.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -37,11 +37,11 @@ void GlobalSettingStation::Sync() noexcept {
   using namespace libconfig;
   try {
     ui_cfg.writeFile(ui_config_path.c_str());
-    LOG(INFO) << "Updated ui configuration successfully written to: "
+    LOG(INFO) << _("Updated ui configuration successfully written to")
               << ui_config_path;
 
   } catch (const FileIOException& fioex) {
-    LOG(ERROR) << "I/O error while writing ui configuration file: "
+    LOG(ERROR) << _("I/O error while writing ui configuration file")
                << ui_config_path;
   }
 }
@@ -50,9 +50,13 @@ GlobalSettingStation::GlobalSettingStation() noexcept {
   using namespace boost::filesystem;
   using namespace libconfig;
 
-  LOG(INFO) << "App Configure Path" << app_configure_path;
-  LOG(INFO) << "App Data Path" << app_data_path;
-  LOG(INFO) << "App Log Path" << app_log_path;
+  el::Loggers::addFlag(el::LoggingFlag::AutoSpacing);
+
+  LOG(INFO) << _("App Path") << app_path;
+  LOG(INFO) << _("App Configure Path") << app_configure_path;
+  LOG(INFO) << _("App Data Path") << app_data_path;
+  LOG(INFO) << _("App Log Path") << app_log_path;
+  LOG(INFO) << _("App Locale Path") << app_locale_path;
 
   if (!is_directory(app_configure_path)) create_directory(app_configure_path);
 
@@ -65,23 +69,24 @@ GlobalSettingStation::GlobalSettingStation() noexcept {
   if (!exists(ui_config_path)) {
     try {
       this->ui_cfg.writeFile(ui_config_path.c_str());
-      LOG(INFO) << "UserInterface configuration successfully written to: "
+      LOG(INFO) << _("UserInterface configuration successfully written to")
                 << ui_config_path;
 
     } catch (const FileIOException& fioex) {
-      LOG(ERROR) << "I/O error while writing UserInterface configuration file: "
-                 << ui_config_path;
+      LOG(ERROR)
+          << _("I/O error while writing UserInterface configuration file")
+          << ui_config_path;
     }
   } else {
     try {
       this->ui_cfg.readFile(ui_config_path.c_str());
-      LOG(INFO) << "UserInterface configuration successfully read from: "
+      LOG(INFO) << _("UserInterface configuration successfully read from")
                 << ui_config_path;
     } catch (const FileIOException& fioex) {
-      LOG(ERROR) << "I/O error while reading UserInterface configure file";
+      LOG(ERROR) << _("I/O error while reading UserInterface configure file");
     } catch (const ParseException& pex) {
-      LOG(ERROR) << "Parse error at " << pex.getFile() << ":" << pex.getLine()
-                 << " - " << pex.getError();
+      LOG(ERROR) << _("Parse error at ") << pex.getFile() << ":"
+                 << pex.getLine() << " - " << pex.getError();
     }
   }
 }
diff --git a/src/ui/settings/GlobalSettingStation.h b/src/ui/settings/GlobalSettingStation.h
index 03a362ba..b5a86865 100644
--- a/src/ui/settings/GlobalSettingStation.h
+++ b/src/ui/settings/GlobalSettingStation.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -33,8 +33,6 @@
 
 class GlobalSettingStation : public QObject {
   Q_OBJECT
-  static std::unique_ptr<GlobalSettingStation> _instance;
-
  public:
   static GlobalSettingStation& GetInstance();
 
@@ -48,6 +46,10 @@ class GlobalSettingStation : public QObject {
     return app_log_path;
   }
 
+  [[nodiscard]] boost::filesystem::path GetLocaleDir() const {
+    return app_locale_path;
+  }
+
   void Sync() noexcept;
 
  private:
@@ -62,6 +64,10 @@ class GlobalSettingStation : public QObject {
   // Program Data Location
   boost::filesystem::path app_log_path = app_data_path / "logs";
 
+  // Program Data Location
+  boost::filesystem::path app_locale_path =
+      RESOURCE_DIR_BOOST_PATH(app_path) / "locales";
+
   // Program Configure Location
   boost::filesystem::path app_configure_path =
       QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation)
@@ -75,6 +81,8 @@ class GlobalSettingStation : public QObject {
   boost::filesystem::path ui_config_path = ui_config_dir_path / "ui.cfg";
 
   libconfig::Config ui_cfg;
+
+  static std::unique_ptr<GlobalSettingStation> _instance;
 };
 
 #endif  // GPGFRONTEND_GLOBALSETTINGSTATION_H
diff --git a/src/ui/settings/SettingsAdvanced.cpp b/src/ui/settings/SettingsAdvanced.cpp
index 048cbe2d..b64ec8e9 100644
--- a/src/ui/settings/SettingsAdvanced.cpp
+++ b/src/ui/settings/SettingsAdvanced.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -34,15 +34,15 @@ AdvancedTab::AdvancedTab(QWidget* parent)
   /*****************************************
    * Steganography Box
    *****************************************/
-  auto* steganoBox = new QGroupBox(tr("Show Steganography Options"));
+  auto* steganoBox = new QGroupBox(_("Show Steganography Options"));
   auto* steganoBoxLayout = new QHBoxLayout();
-  steganoCheckBox = new QCheckBox(tr("Show Steganographic Options."), this);
+  steganoCheckBox = new QCheckBox(_("Show Steganographic Options."), this);
   steganoBoxLayout->addWidget(steganoCheckBox);
   steganoBox->setLayout(steganoBoxLayout);
 
-  auto* pubkeyExchangeBox = new QGroupBox(tr("Pubkey Exchange"));
+  auto* pubkeyExchangeBox = new QGroupBox(_("Pubkey Exchange"));
   auto* pubkeyExchangeBoxLayout = new QHBoxLayout();
-  autoPubkeyExchangeCheckBox = new QCheckBox(tr("Auto Pubkey Exchange"), this);
+  autoPubkeyExchangeCheckBox = new QCheckBox(_("Auto Pubkey Exchange"), this);
   pubkeyExchangeBoxLayout->addWidget(autoPubkeyExchangeCheckBox);
   pubkeyExchangeBox->setLayout(pubkeyExchangeBoxLayout);
 
diff --git a/src/ui/settings/SettingsAdvanced.h b/src/ui/settings/SettingsAdvanced.h
index 197fa22d..d8ec8089 100644
--- a/src/ui/settings/SettingsAdvanced.h
+++ b/src/ui/settings/SettingsAdvanced.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/settings/SettingsAppearance.cpp b/src/ui/settings/SettingsAppearance.cpp
index 74ad6c2a..91bef9ef 100644
--- a/src/ui/settings/SettingsAppearance.cpp
+++ b/src/ui/settings/SettingsAppearance.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -34,11 +34,11 @@ AppearanceTab::AppearanceTab(QWidget* parent)
   /*****************************************
    * Icon-Size-Box
    *****************************************/
-  auto* iconSizeBox = new QGroupBox(tr("Iconsize"));
+  auto* iconSizeBox = new QGroupBox(_("Icon Size"));
   iconSizeGroup = new QButtonGroup();
-  iconSizeSmall = new QRadioButton(tr("small"));
-  iconSizeMedium = new QRadioButton(tr("medium"));
-  iconSizeLarge = new QRadioButton(tr("large"));
+  iconSizeSmall = new QRadioButton(_("small"));
+  iconSizeMedium = new QRadioButton(_("medium"));
+  iconSizeLarge = new QRadioButton(_("large"));
 
   iconSizeGroup->addButton(iconSizeSmall, 1);
   iconSizeGroup->addButton(iconSizeMedium, 2);
@@ -54,11 +54,11 @@ AppearanceTab::AppearanceTab(QWidget* parent)
   /*****************************************
    * Icon-Style-Box
    *****************************************/
-  auto* iconStyleBox = new QGroupBox(tr("Iconstyle"));
+  auto* iconStyleBox = new QGroupBox(_("Icon Style"));
   iconStyleGroup = new QButtonGroup();
-  iconTextButton = new QRadioButton(tr("just text"));
-  iconIconsButton = new QRadioButton(tr("just icons"));
-  iconAllButton = new QRadioButton(tr("text and icons"));
+  iconTextButton = new QRadioButton(_("just text"));
+  iconIconsButton = new QRadioButton(_("just icons"));
+  iconAllButton = new QRadioButton(_("text and icons"));
 
   iconStyleGroup->addButton(iconTextButton, 1);
   iconStyleGroup->addButton(iconIconsButton, 2);
@@ -74,10 +74,10 @@ AppearanceTab::AppearanceTab(QWidget* parent)
   /*****************************************
    * Window-Size-Box
    *****************************************/
-  auto* windowSizeBox = new QGroupBox(tr("Windowstate"));
+  auto* windowSizeBox = new QGroupBox(_("Window State"));
   auto* windowSizeBoxLayout = new QHBoxLayout();
   windowSizeCheckBox =
-      new QCheckBox(tr("Save window size and position on exit."), this);
+      new QCheckBox(_("Save window size and position on exit."), this);
   windowSizeBoxLayout->addWidget(windowSizeCheckBox);
   windowSizeBox->setLayout(windowSizeBoxLayout);
 
@@ -85,13 +85,13 @@ AppearanceTab::AppearanceTab(QWidget* parent)
    * Info-Board-Font-Size-Box
    *****************************************/
 
-  auto* infoBoardBox = new QGroupBox(tr("Information Board"));
+  auto* infoBoardBox = new QGroupBox(_("Information Board"));
   auto* infoBoardLayout = new QHBoxLayout();
   infoBoardFontSizeSpin = new QSpinBox();
   infoBoardFontSizeSpin->setRange(9, 18);
   infoBoardFontSizeSpin->setValue(10);
   infoBoardFontSizeSpin->setSingleStep(1);
-  infoBoardLayout->addWidget(new QLabel(tr(" Front Size")));
+  infoBoardLayout->addWidget(new QLabel(_("Front Size")));
   infoBoardLayout->addWidget(infoBoardFontSizeSpin);
   infoBoardBox->setLayout(infoBoardLayout);
 
diff --git a/src/ui/settings/SettingsAppearance.h b/src/ui/settings/SettingsAppearance.h
index 163f3c93..284ecb1c 100644
--- a/src/ui/settings/SettingsAppearance.h
+++ b/src/ui/settings/SettingsAppearance.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -60,6 +60,6 @@ class AppearanceTab : public QWidget {
   void signalRestartNeeded(bool needed);
 };
 
-}
+}  // namespace GpgFrontend::UI
 
 #endif  // GPGFRONTEND_SETTINGSAPPEARANCE_H
diff --git a/src/ui/settings/SettingsDialog.cpp b/src/ui/settings/SettingsDialog.cpp
index 553ce53e..4f959b68 100644
--- a/src/ui/settings/SettingsDialog.cpp
+++ b/src/ui/settings/SettingsDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -46,14 +46,14 @@ SettingsDialog::SettingsDialog(QWidget* parent) : QDialog(parent) {
   advancedTab = new AdvancedTab;
   gpgPathsTab = new GpgPathsTab;
 
-  tabWidget->addTab(generalTab, tr("General"));
-  tabWidget->addTab(appearanceTab, tr("Appearance"));
+  tabWidget->addTab(generalTab, _("General"));
+  tabWidget->addTab(appearanceTab, _("Appearance"));
 #ifdef SMTP_SUPPORT
-  tabWidget->addTab(sendMailTab, tr("Send Mail"));
+  tabWidget->addTab(sendMailTab, _("Send Mail"));
 #endif
-  tabWidget->addTab(keyserverTab, tr("Key Server"));
-  // tabWidget->addTab(gpgPathsTab, tr("Gpg paths"));
-  tabWidget->addTab(advancedTab, tr("Advanced"));
+  tabWidget->addTab(keyserverTab, _("Key Server"));
+  // tabWidget->addTab(gpgPathsTab, _("Gpg paths"));
+  tabWidget->addTab(advancedTab, _("Advanced"));
 
   buttonBox =
       new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
@@ -68,7 +68,7 @@ SettingsDialog::SettingsDialog(QWidget* parent) : QDialog(parent) {
   mainLayout->stretch(0);
   setLayout(mainLayout);
 
-  setWindowTitle(tr("Settings"));
+  setWindowTitle(_("Settings"));
 
   // slots for handling the restartneeded member
   this->slotSetRestartNeeded(false);
@@ -118,7 +118,7 @@ void SettingsDialog::slotAccept() {
 QHash<QString, QString> SettingsDialog::listLanguages() {
   QHash<QString, QString> languages;
 
-  languages.insert("", tr("System Default"));
+  languages.insert(QString(), _("System Default"));
 
   QString appPath = qApp->applicationDirPath();
   QDir qmDir = QDir(RESOURCE_DIR(appPath) + "/ts/");
@@ -153,26 +153,29 @@ GpgPathsTab::GpgPathsTab(QWidget* parent)
   /*****************************************
    * Keydb Box
    *****************************************/
-  auto* keydbBox = new QGroupBox(tr("Relative path to keydb"));
+  auto* keydbBox = new QGroupBox(_("Relative path to Key Database"));
   auto* keydbBoxLayout = new QGridLayout();
 
   // Label containing the current keydbpath relative to default keydb path
   keydbLabel = new QLabel(accKeydbPath, this);
 
-  auto* keydbButton = new QPushButton("Change keydb path", this);
+  auto* keydbButton = new QPushButton(_("Change Key Database path"), this);
   connect(keydbButton, SIGNAL(clicked()), this, SLOT(chooseKeydbDir()));
-  auto* keydbDefaultButton = new QPushButton("Set keydb to default path", this);
+  auto* keydbDefaultButton =
+      new QPushButton(_("Set Key Database to default path"), this);
   connect(keydbDefaultButton, SIGNAL(clicked()), this,
           SLOT(setKeydbPathToDefault()));
 
   keydbBox->setLayout(keydbBoxLayout);
-  keydbBoxLayout->addWidget(new QLabel(tr("Current keydb path: ")), 1, 1);
+  keydbBoxLayout->addWidget(
+      new QLabel(QString(_("Current Key Database path")) + ": "), 1, 1);
   keydbBoxLayout->addWidget(keydbLabel, 1, 2);
   keydbBoxLayout->addWidget(keydbButton, 1, 3);
   keydbBoxLayout->addWidget(keydbDefaultButton, 2, 3);
   keydbBoxLayout->addWidget(
-      new QLabel(tr("<b>NOTE: </b> Gpg4usb will restart automatically if you "
-                    "change the keydb path!")),
+      new QLabel(QString("<b>") + _("NOTE") + ": </b> " +
+                 _("GpgFrontend will restart automatically if you change the "
+                   "Key Database path!")),
       3, 1, 1, 3);
 
   auto* mainLayout = new QVBoxLayout;
@@ -200,12 +203,12 @@ void GpgPathsTab::setKeydbPathToDefault() {
 
 QString GpgPathsTab::chooseKeydbDir() {
   QString dir = QFileDialog::getExistingDirectory(
-      this, tr("Choose keydb directory"), accKeydbPath,
+      this, _("Choose keydb directory"), accKeydbPath,
       QFileDialog::ShowDirsOnly);
 
   accKeydbPath = getRelativePath(defKeydbPath, dir);
   keydbLabel->setText(accKeydbPath);
-  return "";
+  return {};
 }
 
 void GpgPathsTab::setSettings() {
diff --git a/src/ui/settings/SettingsDialog.h b/src/ui/settings/SettingsDialog.h
index 0f89e266..9f670cfd 100755
--- a/src/ui/settings/SettingsDialog.h
+++ b/src/ui/settings/SettingsDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/settings/SettingsGeneral.cpp b/src/ui/settings/SettingsGeneral.cpp
index f5a98282..51e0649c 100644
--- a/src/ui/settings/SettingsGeneral.cpp
+++ b/src/ui/settings/SettingsGeneral.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -45,12 +45,12 @@ GeneralTab::GeneralTab(QWidget* parent)
   /*****************************************
    * GpgFrontend Server
    *****************************************/
-  auto* serverBox = new QGroupBox(tr("GpgFrontend Server"));
+  auto* serverBox = new QGroupBox(_("GpgFrontend Server"));
   auto* serverBoxLayout = new QVBoxLayout();
   serverSelectBox = new QComboBox();
   serverBoxLayout->addWidget(serverSelectBox);
   serverBoxLayout->addWidget(new QLabel(
-      tr("Server that provides short key and key exchange services")));
+      _("Server that provides short key and key exchange services")));
 
   serverBox->setLayout(serverBoxLayout);
 #endif
@@ -58,10 +58,10 @@ GeneralTab::GeneralTab(QWidget* parent)
   /*****************************************
    * Save-Checked-Keys-Box
    *****************************************/
-  auto* saveCheckedKeysBox = new QGroupBox(tr("Save Checked Keys"));
+  auto* saveCheckedKeysBox = new QGroupBox(_("Save Checked Keys"));
   auto* saveCheckedKeysBoxLayout = new QHBoxLayout();
   saveCheckedKeysCheckBox = new QCheckBox(
-      tr("Save checked private keys on exit and restore them on next start."),
+      _("Save checked private keys on exit and restore them on next start."),
       this);
   saveCheckedKeysBoxLayout->addWidget(saveCheckedKeysCheckBox);
   saveCheckedKeysBox->setLayout(saveCheckedKeysBoxLayout);
@@ -70,10 +70,10 @@ GeneralTab::GeneralTab(QWidget* parent)
    * Key-Impport-Confirmation Box
    *****************************************/
   auto* importConfirmationBox =
-      new QGroupBox(tr("Confirm drag'n'drop key import"));
+      new QGroupBox(_("Confirm drag'n'drop key import"));
   auto* importConfirmationBoxLayout = new QHBoxLayout();
   importConfirmationCheckBox = new QCheckBox(
-      tr("Import files dropped on the keylist without confirmation."), this);
+      _("Import files dropped on the Key List without confirmation."), this);
   importConfirmationBoxLayout->addWidget(importConfirmationCheckBox);
   importConfirmationBox->setLayout(importConfirmationBoxLayout);
 
@@ -81,7 +81,7 @@ GeneralTab::GeneralTab(QWidget* parent)
   /*****************************************
    * Language Select Box
    *****************************************/
-  auto* langBox = new QGroupBox(tr("Language"));
+  auto* langBox = new QGroupBox(_("Language"));
   auto* langBoxLayout = new QVBoxLayout();
   langSelectBox = new QComboBox;
   lang = SettingsDialog::listLanguages();
@@ -91,9 +91,9 @@ GeneralTab::GeneralTab(QWidget* parent)
   }
 
   langBoxLayout->addWidget(langSelectBox);
-  langBoxLayout->addWidget(
-      new QLabel(tr("<b>NOTE: </b> GpgFrontend will restart automatically if "
-                    "you change the language!")));
+  langBoxLayout->addWidget(new QLabel(
+      "<b>" + QString(_("NOTE")) + _(": ") + "</b>" +
+      _("GpgFrontend will restart automatically if you change the language!")));
   langBox->setLayout(langBoxLayout);
   connect(langSelectBox, SIGNAL(currentIndexChanged(int)), this,
           SLOT(slotLanguageChanged()));
@@ -103,12 +103,12 @@ GeneralTab::GeneralTab(QWidget* parent)
   /*****************************************
    * Own Key Select Box
    *****************************************/
-  auto* ownKeyBox = new QGroupBox(tr("Own key"));
+  auto* ownKeyBox = new QGroupBox(_("Own key"));
   auto* ownKeyBoxLayout = new QVBoxLayout();
   auto* ownKeyServiceTokenLayout = new QHBoxLayout();
   ownKeySelectBox = new QComboBox;
-  getServiceTokenButton = new QPushButton(tr("Get Service Token"));
-  serviceTokenLabel = new QLabel(tr("No Service Token Found"));
+  getServiceTokenButton = new QPushButton(_("Get Service Token"));
+  serviceTokenLabel = new QLabel(_("No Service Token Found"));
   serviceTokenLabel->setAlignment(Qt::AlignCenter);
 
   ownKeyBox->setLayout(ownKeyBoxLayout);
@@ -116,7 +116,7 @@ GeneralTab::GeneralTab(QWidget* parent)
   mKeyList = new KeyList();
 
   // Fill the keyid hashmap
-  keyIds.insert({"", "<none>"});
+  keyIds.insert({QString(), "<none>"});
 
   auto private_keys = mKeyList->getAllPrivateKeys();
 
@@ -135,7 +135,7 @@ GeneralTab::GeneralTab(QWidget* parent)
           SLOT(slotGetServiceToken()));
 
   ownKeyBoxLayout->addWidget(new QLabel(
-      tr("Key pair for synchronization and identity authentication")));
+      _("Key pair for synchronization and identity authentication")));
   ownKeyBoxLayout->addWidget(ownKeySelectBox);
   ownKeyBoxLayout->addLayout(ownKeyServiceTokenLayout);
   ownKeyServiceTokenLayout->addWidget(getServiceTokenButton);
@@ -204,7 +204,7 @@ void GeneralTab::setSettings() {
   // Language setting
   QString langKey = settings.value("int/lang").toString();
   QString langValue = lang.value(langKey);
-  if (langKey != "") {
+  if (!langKey.isEmpty()) {
     langSelectBox->setCurrentIndex(langSelectBox->findText(langValue));
   }
 
@@ -277,7 +277,7 @@ void GeneralTab::slotLanguageChanged() { emit signalRestartNeeded(true); }
 #ifdef SERVER_SUPPORT
 void GeneralTab::slotOwnKeyIdChanged() {
   // Set ownKeyId to currently selected
-  this->serviceTokenLabel->setText(tr("No Service Token Found"));
+  this->serviceTokenLabel->setText(_("No Service Token Found"));
   serviceToken.clear();
 }
 #endif
@@ -296,8 +296,8 @@ void GeneralTab::slotGetServiceToken() {
 
   if (keyId.isEmpty()) {
     QMessageBox::critical(
-        this, tr("Invalid Operation"),
-        tr("Own Key can not be None while getting service token."));
+        this, _("Invalid Operation"),
+        _("Own Key can not be None while getting service token."));
     return;
   }
 
@@ -309,7 +309,7 @@ void GeneralTab::slotGetServiceToken() {
   GpgKey key = mCtx->getKeyRefById(keyId);
 
   if (!key.good) {
-    QMessageBox::critical(this, tr("Error"), tr("Key Not Exists"));
+    QMessageBox::critical(this, _("Error"), _("Key Not Exists"));
     return;
   }
 
@@ -380,9 +380,9 @@ void GeneralTab::slotGetServiceToken() {
 
     if (!utils->checkDataValueStr("serviceToken") ||
         !utils->checkDataValueStr("fpr")) {
-      QMessageBox::critical(this, tr("Error"),
-                            tr("The communication content with the server does "
-                               "not meet the requirements"));
+      QMessageBox::critical(this, _("Error"),
+                            _("The communication content with the server does "
+                              "not meet the requirements"));
       return;
     }
 
@@ -395,12 +395,12 @@ void GeneralTab::slotGetServiceToken() {
       // Auto update settings
       settings.setValue("general/serviceToken", serviceToken);
       serviceTokenLabel->setText(serviceToken);
-      QMessageBox::information(this, tr("Notice"),
-                               tr("Succeed in getting service token"));
+      QMessageBox::information(this, _("Notice"),
+                               _("Succeed in getting service token"));
     } else {
       QMessageBox::critical(
-          this, tr("Error"),
-          tr("There is a problem with the communication with the server"));
+          this, _("Error"),
+          _("There is a problem with the communication with the server"));
     }
   }
 }
diff --git a/src/ui/settings/SettingsGeneral.h b/src/ui/settings/SettingsGeneral.h
index cc61d8bc..5816af9d 100644
--- a/src/ui/settings/SettingsGeneral.h
+++ b/src/ui/settings/SettingsGeneral.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/settings/SettingsKeyServer.cpp b/src/ui/settings/SettingsKeyServer.cpp
index d232a46e..dc77491b 100644
--- a/src/ui/settings/SettingsKeyServer.cpp
+++ b/src/ui/settings/SettingsKeyServer.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -31,7 +31,7 @@ KeyserverTab::KeyserverTab(QWidget* parent)
       appPath(qApp->applicationDirPath()),
       settings(RESOURCE_DIR(appPath) + "/conf/gpgfrontend.ini",
                QSettings::IniFormat) {
-  auto generalGroupBox = new QGroupBox(tr("General"));
+  auto generalGroupBox = new QGroupBox(_("General"));
   auto generalLayout = new QVBoxLayout();
 
   keyServerTable = new QTableWidget();
@@ -53,11 +53,11 @@ KeyserverTab::KeyserverTab(QWidget* parent)
   keyServerTable->setAlternatingRowColors(true);
 
   QStringList labels;
-  labels << tr("No.") << tr("Address") << tr("Available");
+  labels << _("No.") << _("Address") << _("Available");
   keyServerTable->setHorizontalHeaderLabels(labels);
 
   auto* mainLayout = new QVBoxLayout(this);
-  auto* label = new QLabel(tr("Default Key Server for Import:"));
+  auto* label = new QLabel(QString(_("Default Key Server for Import")) + ": ");
 
   comboBox = new QComboBox;
   comboBox->setEditable(false);
@@ -67,7 +67,7 @@ KeyserverTab::KeyserverTab(QWidget* parent)
   auto* addKeyServerLayout = new QHBoxLayout(addKeyServerBox);
   auto* http = new QLabel("URL: ");
   newKeyServerEdit = new QLineEdit(this);
-  auto* newKeyServerButton = new QPushButton(tr("Add"), this);
+  auto* newKeyServerButton = new QPushButton(_("Add"), this);
   connect(newKeyServerButton, SIGNAL(clicked()), this, SLOT(addKeyServer()));
   addKeyServerLayout->addWidget(http);
   addKeyServerLayout->addWidget(newKeyServerEdit);
@@ -140,7 +140,7 @@ void KeyserverTab::refreshTable() {
     auto* tmp2 = new QTableWidgetItem(server);
     tmp2->setTextAlignment(Qt::AlignCenter);
     keyServerTable->setItem(index, 1, tmp2);
-    auto* tmp3 = new QTableWidgetItem("");
+    auto* tmp3 = new QTableWidgetItem();
     tmp3->setTextAlignment(Qt::AlignCenter);
     keyServerTable->setItem(index, 2, tmp3);
     index++;
diff --git a/src/ui/settings/SettingsKeyServer.h b/src/ui/settings/SettingsKeyServer.h
index ce7c5b2e..23186702 100644
--- a/src/ui/settings/SettingsKeyServer.h
+++ b/src/ui/settings/SettingsKeyServer.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -56,6 +56,6 @@ class KeyserverTab : public QWidget {
 
   void signalRestartNeeded(bool needed);
 };
-}
+}  // namespace GpgFrontend::UI
 
 #endif  // GPGFRONTEND_SETTINGSKEYSERVER_H
diff --git a/src/ui/settings/SettingsSendMail.cpp b/src/ui/settings/SettingsSendMail.cpp
index 9d48b2a0..2518991d 100644
--- a/src/ui/settings/SettingsSendMail.cpp
+++ b/src/ui/settings/SettingsSendMail.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -35,7 +35,7 @@ SendMailTab::SendMailTab(QWidget* parent)
       appPath(qApp->applicationDirPath()),
       settings(RESOURCE_DIR(appPath) + "/conf/gpgfrontend.ini",
                QSettings::IniFormat) {
-  enableCheckBox = new QCheckBox(tr("Enable"));
+  enableCheckBox = new QCheckBox(_("Enable"));
   enableCheckBox->setTristate(false);
 
   smtpAddress = new QLineEdit();
@@ -54,31 +54,31 @@ SendMailTab::SendMailTab(QWidget* parent)
 
   defaultSender = new QLineEdit();
   ;
-  checkConnectionButton = new QPushButton(tr("Check Connection"));
+  checkConnectionButton = new QPushButton(_("Check Connection"));
 
-  auto generalGroupBox = new QGroupBox(tr("General"));
-  auto connectGroupBox = new QGroupBox(tr("Connection"));
-  auto preferenceGroupBox = new QGroupBox(tr("Preference"));
+  auto generalGroupBox = new QGroupBox(_("General"));
+  auto connectGroupBox = new QGroupBox(_("Connection"));
+  auto preferenceGroupBox = new QGroupBox(_("Preference"));
 
   auto generalLayout = new QGridLayout();
   generalLayout->addWidget(enableCheckBox);
 
   auto connectLayout = new QGridLayout();
-  connectLayout->addWidget(new QLabel(tr("SMTP Address")), 1, 0);
+  connectLayout->addWidget(new QLabel(_("SMTP Address")), 1, 0);
   connectLayout->addWidget(smtpAddress, 1, 1, 1, 4);
-  connectLayout->addWidget(new QLabel(tr("Username")), 2, 0);
+  connectLayout->addWidget(new QLabel(_("Username")), 2, 0);
   connectLayout->addWidget(username, 2, 1, 1, 4);
-  connectLayout->addWidget(new QLabel(tr("Password")), 3, 0);
+  connectLayout->addWidget(new QLabel(_("Password")), 3, 0);
   connectLayout->addWidget(password, 3, 1, 1, 4);
-  connectLayout->addWidget(new QLabel(tr("Port")), 4, 0);
+  connectLayout->addWidget(new QLabel(_("Port")), 4, 0);
   connectLayout->addWidget(portSpin, 4, 1, 1, 1);
-  connectLayout->addWidget(new QLabel(tr("Connection Security")), 5, 0);
+  connectLayout->addWidget(new QLabel(_("Connection Security")), 5, 0);
   connectLayout->addWidget(connectionTypeComboBox, 5, 1, 1, 1);
   connectLayout->addWidget(checkConnectionButton, 6, 0);
 
   auto preferenceLayout = new QGridLayout();
 
-  preferenceLayout->addWidget(new QLabel(tr("Default Sender")), 0, 0);
+  preferenceLayout->addWidget(new QLabel(_("Default Sender")), 0, 0);
   preferenceLayout->addWidget(defaultSender, 0, 1, 1, 4);
 
   generalGroupBox->setLayout(generalLayout);
@@ -164,17 +164,17 @@ void SendMailTab::slotCheckConnection() {
   bool if_success = true;
 
   if (!smtp.connectToHost()) {
-    QMessageBox::critical(this, tr("Fail"), tr("Fail to Connect SMTP Server"));
+    QMessageBox::critical(this, _("Fail"), _("Fail to Connect SMTP Server"));
     if_success = false;
   }
   if (if_success && !smtp.login()) {
-    QMessageBox::critical(this, tr("Fail"), tr("Fail to Login"));
+    QMessageBox::critical(this, _("Fail"), _("Fail to Login"));
     if_success = false;
   }
 
   if (if_success)
-    QMessageBox::information(this, tr("Success"),
-                             tr("Succeed in connecting and login"));
+    QMessageBox::information(this, _("Success"),
+                             _("Succeed in connecting and login"));
 }
 #endif
 
diff --git a/src/ui/smtp/SendMailDialog.cpp b/src/ui/smtp/SendMailDialog.cpp
index 51ece6c9..7c8933a0 100644
--- a/src/ui/smtp/SendMailDialog.cpp
+++ b/src/ui/smtp/SendMailDialog.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -40,9 +40,9 @@ SendMailDialog::SendMailDialog(QString text, QWidget* parent)
       mText(std::move(text)) {
   if (smtpAddress.isEmpty()) {
     QMessageBox::critical(
-        this, tr("Incomplete configuration"),
-        tr("The SMTP address is empty, please go to the setting interface to "
-           "complete the configuration."));
+        this, _("Incomplete configuration"),
+        _("The SMTP address is empty, please go to the setting interface to "
+          "complete the configuration."));
 
     deleteLater();
     return;
@@ -96,21 +96,23 @@ void SendMailDialog::slotConfirm() {
   QStringList rcptStringList = recipientEdit->toPlainText().split(';');
 
   if (rcptStringList.isEmpty()) {
-    errString.append(tr("  Recipient cannot be empty  \n"));
+    errString.append(QString("  ") + _("Recipient cannot be empty") + "  \n");
   } else {
     for (const auto& reci : rcptStringList) {
       qDebug() << "Receiver" << reci.trimmed();
       if (!check_email_address(reci.trimmed())) {
-        errString.append(
-            tr("  One or more Recipient's Email Address is invalid  \n"));
+        errString.append(QString("  ") +
+                         _("One or more Recipient's Email Address is invalid") +
+                         "  \n");
         break;
       }
     }
   }
   if (senderEdit->text().isEmpty()) {
-    errString.append(tr("  Sender cannot be empty  \n"));
+    errString.append(QString("  ") + _("Sender cannot be empty") + "  \n");
   } else if (!check_email_address(senderEdit->text())) {
-    errString.append(tr("  Sender's Email Address is invalid  \n"));
+    errString.append(QString("  ") + _("Sender's Email Address is invalid") +
+                     "  \n");
   }
 
   if (!errString.isEmpty()) {
@@ -166,26 +168,25 @@ void SendMailDialog::slotConfirm() {
   // Now we can send the mail
   if (!smtp.connectToHost()) {
     qDebug() << "Connect to SMTP Server Failed";
-    QMessageBox::critical(this, tr("Fail"), tr("Fail to Connect SMTP Server"));
+    QMessageBox::critical(this, _("Fail"), _("Fail to Connect SMTP Server"));
     return;
   }
   if (!smtp.login()) {
     qDebug() << "Login to SMTP Server Failed";
-    QMessageBox::critical(this, tr("Fail"),
-                          tr("Fail to Login into SMTP Server"));
+    QMessageBox::critical(this, _("Fail"), _("Fail to Login into SMTP Server"));
     return;
   }
   if (!smtp.sendMail(message)) {
     qDebug() << "Send Mail to SMTP Server Failed";
-    QMessageBox::critical(this, tr("Fail"),
-                          tr("Fail to Send Mail to SMTP Server"));
+    QMessageBox::critical(this, _("Fail"),
+                          _("Fail to Send Mail to SMTP Server"));
     return;
   }
   smtp.quit();
 
   // Close after sending email
-  QMessageBox::information(this, tr("Success"),
-                           tr("Succeed in Sending Mail to SMTP Server"));
+  QMessageBox::information(this, _("Success"),
+                           _("Succeed in Sending Mail to SMTP Server"));
   deleteLater();
 }
 
diff --git a/src/ui/smtp/SendMailDialog.h b/src/ui/smtp/SendMailDialog.h
index 6afdfe79..87dfd81f 100644
--- a/src/ui/smtp/SendMailDialog.h
+++ b/src/ui/smtp/SendMailDialog.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/EditorPage.cpp b/src/ui/widgets/EditorPage.cpp
index 26976048..6fd72c20 100644
--- a/src/ui/widgets/EditorPage.cpp
+++ b/src/ui/widgets/EditorPage.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -41,7 +41,7 @@ EditorPage::EditorPage(QString filePath, QWidget* parent)
   mainLayout->addWidget(textPage);
   mainLayout->setContentsMargins(0, 0, 0, 0);
   setLayout(mainLayout);
-  
+
   textPage->setFocus();
 
   // Front in same width
diff --git a/src/ui/widgets/EditorPage.h b/src/ui/widgets/EditorPage.h
index 0f637500..1e19a0de 100644
--- a/src/ui/widgets/EditorPage.h
+++ b/src/ui/widgets/EditorPage.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/FilePage.cpp b/src/ui/widgets/FilePage.cpp
index 2cb59ae1..4b88092b 100644
--- a/src/ui/widgets/FilePage.cpp
+++ b/src/ui/widgets/FilePage.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -167,17 +167,17 @@ void FilePage::slotGoPath() {
 void FilePage::createPopupMenu() {
   popUpMenu = new QMenu();
 
-  auto openItemAct = new QAction(tr("Open"), this);
+  auto openItemAct = new QAction(_("Open"), this);
   connect(openItemAct, SIGNAL(triggered()), this, SLOT(slotOpenItem()));
-  auto deleteItemAct = new QAction(tr("Delete"), this);
+  auto deleteItemAct = new QAction(_("Delete"), this);
   connect(deleteItemAct, SIGNAL(triggered()), this, SLOT(slotDeleteItem()));
-  encryptItemAct = new QAction(tr("Encrypt and Sign"), this);
+  encryptItemAct = new QAction(_("Encrypt and Sign"), this);
   connect(encryptItemAct, SIGNAL(triggered()), this, SLOT(slotEncryptItem()));
-  decryptItemAct = new QAction(tr("Decrypt and Verify"), this);
+  decryptItemAct = new QAction(_("Decrypt and Verify"), this);
   connect(decryptItemAct, SIGNAL(triggered()), this, SLOT(slotDecryptItem()));
-  signItemAct = new QAction(tr("Only Sign"), this);
+  signItemAct = new QAction(_("Only Sign"), this);
   connect(signItemAct, SIGNAL(triggered()), this, SLOT(slotSignItem()));
-  verifyItemAct = new QAction(tr("Only Verify"), this);
+  verifyItemAct = new QAction(_("Only Verify"), this);
   connect(verifyItemAct, SIGNAL(triggered()), this, SLOT(slotVerifyItem()));
 
   popUpMenu->addAction(openItemAct);
@@ -233,8 +233,8 @@ void FilePage::slotDeleteItem() {
   QModelIndex index = dirTreeView->currentIndex();
   QVariant data = dirTreeView->model()->data(index);
 
-  auto ret = QMessageBox::warning(this, tr("Warning"),
-                                  tr("Are you sure you want to delete it?"),
+  auto ret = QMessageBox::warning(this, _("Warning"),
+                                  _("Are you sure you want to delete it?"),
                                   QMessageBox::Ok | QMessageBox::Cancel);
 
   if (ret == QMessageBox::Cancel) return;
@@ -242,8 +242,8 @@ void FilePage::slotDeleteItem() {
   qDebug() << "Delete Item" << data.toString();
 
   if (!dirModel->remove(index)) {
-    QMessageBox::critical(this, tr("Error"),
-                          tr("Unable to delete the file or folder."));
+    QMessageBox::critical(this, _("Error"),
+                          _("Unable to delete the file or folder."));
   }
 }
 
diff --git a/src/ui/widgets/FilePage.h b/src/ui/widgets/FilePage.h
index 9fd4308e..31be81f3 100644
--- a/src/ui/widgets/FilePage.h
+++ b/src/ui/widgets/FilePage.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/GroupKeyList.cpp b/src/ui/widgets/GroupKeyList.cpp
index 404e8faf..efba4428 100644
--- a/src/ui/widgets/GroupKeyList.cpp
+++ b/src/ui/widgets/GroupKeyList.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/GroupKeyList.h b/src/ui/widgets/GroupKeyList.h
index f0c9e2c6..163c7126 100644
--- a/src/ui/widgets/GroupKeyList.h
+++ b/src/ui/widgets/GroupKeyList.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/HelpPage.cpp b/src/ui/widgets/HelpPage.cpp
index dfc24929..7b1e86c0 100644
--- a/src/ui/widgets/HelpPage.cpp
+++ b/src/ui/widgets/HelpPage.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -77,8 +77,6 @@ QUrl HelpPage::localizedHelp(const QUrl& url) {
   }
 }
 
-QTextBrowser* HelpPage::getBrowser() {
-  return browser;
-}
+QTextBrowser* HelpPage::getBrowser() { return browser; }
 
 }  // namespace GpgFrontend::UI
diff --git a/src/ui/widgets/InfoBoardWidget.cpp b/src/ui/widgets/InfoBoardWidget.cpp
index aac80514..7de99a2b 100644
--- a/src/ui/widgets/InfoBoardWidget.cpp
+++ b/src/ui/widgets/InfoBoardWidget.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -39,7 +39,7 @@ InfoBoardWidget::InfoBoardWidget(QWidget* parent, KeyList* keyList)
   infoBoard->setContentsMargins(0, 0, 0, 0);
 
   importFromKeyserverAct =
-      new QAction(tr("Import missing key from Keyserver"), this);
+      new QAction(_("Import missing key from Keyserver"), this);
   connect(importFromKeyserverAct, SIGNAL(triggered()), this,
           SLOT(slotImportFromKeyserver()));
 
@@ -57,7 +57,7 @@ InfoBoardWidget::InfoBoardWidget(QWidget* parent, KeyList* keyList)
   actionButtonLayout->setSpacing(0);
   actionButtonMenu->setLayout(actionButtonLayout);
 
-  auto label = new QLabel(tr("Optional Actions"));
+  auto label = new QLabel(_("Optional Actions"));
   label->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
   label->setContentsMargins(0, 0, 0, 0);
 
diff --git a/src/ui/widgets/InfoBoardWidget.h b/src/ui/widgets/InfoBoardWidget.h
index 5512a78a..858aa014 100644
--- a/src/ui/widgets/InfoBoardWidget.h
+++ b/src/ui/widgets/InfoBoardWidget.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/KeyList.cpp b/src/ui/widgets/KeyList.cpp
index 4cb30acf..b3391c68 100644
--- a/src/ui/widgets/KeyList.cpp
+++ b/src/ui/widgets/KeyList.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -78,8 +78,8 @@ KeyList::KeyList(KeyListRow::KeyType selectType,
   }
 
   QStringList labels;
-  labels << tr("Select") << tr("Type") << tr("Name") << tr("Email Address")
-         << tr("Usage") << tr("Validity") << tr("Finger Print");
+  labels << _("Select") << _("Type") << _("Name") << _("Email Address")
+         << _("Usage") << _("Validity") << _("Finger Print");
 
   mKeyList->setHorizontalHeaderLabels(labels);
   mKeyList->horizontalHeader()->setStretchLastSection(false);
@@ -103,7 +103,6 @@ KeyList::KeyList(KeyListRow::KeyType selectType,
 }
 
 void KeyList::slotRefresh() {
-
   LOG(INFO) << "KeyList::slotRefresh Called";
 
   auto keyList = getChecked();
@@ -302,14 +301,16 @@ void KeyList::addMenuAction(QAction* act) { popupMenu->addAction(act); }
 void KeyList::dropEvent(QDropEvent* event) {
   auto* dialog = new QDialog();
 
-  dialog->setWindowTitle(tr("Import Keys"));
+  dialog->setWindowTitle(_("Import Keys"));
   QLabel* label;
-  label = new QLabel(tr("You've dropped something on the table.\n GpgFrontend "
-                        "will now try to import key(s).") +
-                     "\n");
+  label =
+      new QLabel(QString(_("You've dropped something on the table.")) + "\n " +
+                 _("GpgFrontend "
+                   "will now try to import key(s).") +
+                 "\n");
 
   // "always import keys"-CheckBox
-  auto* checkBox = new QCheckBox(tr("Always import without bothering."));
+  auto* checkBox = new QCheckBox(_("Always import without bothering."));
   if (settings.value("general/confirmImportKeys").toBool())
     checkBox->setCheckState(Qt::Unchecked);
 
@@ -343,7 +344,8 @@ void KeyList::dropEvent(QDropEvent* event) {
       QFile file;
       file.setFileName(tmp.toLocalFile());
       if (!file.open(QIODevice::ReadOnly)) {
-        qDebug() << tr("Couldn't Open File: ") + tmp.toString();
+        LOG(INFO) << _("Couldn't Open File") << ":"
+                  << tmp.toString().toStdString();
       }
       QByteArray inBuffer = file.readAll();
       this->importKeys(inBuffer);
diff --git a/src/ui/widgets/KeyList.h b/src/ui/widgets/KeyList.h
index c1c49c5c..524b2bd0 100644
--- a/src/ui/widgets/KeyList.h
+++ b/src/ui/widgets/KeyList.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/SignersPicker.cpp b/src/ui/widgets/SignersPicker.cpp
index 3c720b10..3131989b 100644
--- a/src/ui/widgets/SignersPicker.cpp
+++ b/src/ui/widgets/SignersPicker.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -27,7 +27,7 @@
 namespace GpgFrontend::UI {
 
 SignersPicker::SignersPicker(QWidget* parent) : QDialog(parent) {
-  auto confirmButton = new QPushButton(tr("Confirm"));
+  auto confirmButton = new QPushButton(_("Confirm"));
   connect(confirmButton, SIGNAL(clicked(bool)), this, SLOT(accept()));
 
   /*Setup KeyList*/
diff --git a/src/ui/widgets/SignersPicker.h b/src/ui/widgets/SignersPicker.h
index 278e0142..055b6ef6 100644
--- a/src/ui/widgets/SignersPicker.h
+++ b/src/ui/widgets/SignersPicker.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/TextEdit.cpp b/src/ui/widgets/TextEdit.cpp
index aaac98ee..efc2abbf 100644
--- a/src/ui/widgets/TextEdit.cpp
+++ b/src/ui/widgets/TextEdit.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -24,6 +24,8 @@
 
 #include "ui/widgets/TextEdit.h"
 
+#include <boost/format.hpp>
+
 namespace GpgFrontend::UI {
 
 TextEdit::TextEdit(QWidget* parent) : QWidget(parent) {
@@ -46,7 +48,7 @@ TextEdit::TextEdit(QWidget* parent) : QWidget(parent) {
 }
 
 void TextEdit::slotNewTab() {
-  QString header = tr("untitled") + QString::number(++countPage) + ".txt";
+  QString header = _("untitled") + QString::number(++countPage) + ".txt";
 
   auto* page = new EditorPage();
   tabWidget->addTab(page, header);
@@ -83,9 +85,11 @@ void TextEdit::slotOpenFile(QString& path) {
     page->getTextPage()->setFocus();
     page->readFile();
   } else {
-    QMessageBox::warning(
-        this, tr("Warning"),
-        tr("Cannot read file %1:\n%2.").arg(path).arg(file.errorString()));
+    QMessageBox::warning(this, _("Warning"),
+                         (boost::format(_("Cannot read file %1%:\n%2%.")) %
+                          path.toStdString() % file.errorString().toStdString())
+                             .str()
+                             .c_str());
   }
 
   file.close();
@@ -93,7 +97,7 @@ void TextEdit::slotOpenFile(QString& path) {
 
 void TextEdit::slotOpen() {
   QStringList fileNames =
-      QFileDialog::getOpenFileNames(this, tr("Open file"), QDir::currentPath());
+      QFileDialog::getOpenFileNames(this, _("Open file"), QDir::currentPath());
   for (const auto& fileName : fileNames) {
     if (!fileName.isEmpty()) {
       QFile file(fileName);
@@ -118,10 +122,12 @@ void TextEdit::slotOpen() {
         // enableAction(true)
         file.close();
       } else {
-        QMessageBox::warning(this, tr("Warning"),
-                             tr("Cannot read file %1:\n%2.")
-                                 .arg(fileName)
-                                 .arg(file.errorString()));
+        QMessageBox::warning(
+            this, _("Warning"),
+            (boost::format(_("Cannot read file %1%:\n%2%.")) %
+             fileName.toStdString() % file.errorString().toStdString())
+                .str()
+                .c_str());
       }
     }
   }
@@ -164,13 +170,16 @@ bool TextEdit::saveFile(const QString& fileName) {
     int curIndex = tabWidget->currentIndex();
     tabWidget->setTabText(curIndex, strippedName(fileName));
     page->setFilePath(fileName);
-    //      statusBar()->showMessage(tr("File saved"), 2000);
+    //      statusBar()->showMessage(_("File saved"), 2000);
     file.close();
     return true;
   } else {
     QMessageBox::warning(
-        this, tr("File"),
-        tr("Cannot write file %1:\n%2.").arg(fileName).arg(file.errorString()));
+        this, _("Warning"),
+        (boost::format(_("Cannot read file %1%:\n%2%.")) %
+         fileName.toStdString() % file.errorString().toStdString())
+            .str()
+            .c_str());
     return false;
   }
 }
@@ -182,13 +191,13 @@ bool TextEdit::slotSaveAs() {
 
   EditorPage* page = slotCurPageTextEdit();
   QString path;
-  if (page->getFilePath() != "") {
+  if (!page->getFilePath().isEmpty()) {
     path = page->getFilePath();
   } else {
     path = tabWidget->tabText(tabWidget->currentIndex()).remove(0, 2);
   }
 
-  QString fileName = QFileDialog::getSaveFileName(this, tr("Save file"), path);
+  QString fileName = QFileDialog::getSaveFileName(this, _("Save file"), path);
   return saveFile(fileName);
 }
 
@@ -250,16 +259,18 @@ bool TextEdit::maybeSaveCurrentTab(bool askToSave) {
     const QString& filePath = page->getFilePath();
     if (askToSave) {
       result = QMessageBox::warning(
-          this, tr("Unsaved document"),
-          tr("The document \"%1\" has been modified. Do you want to "
-             "save your changes?<br/>")
+          this, _("Unsaved document"),
+          QString(_("The document \"%1\" has been modified. Do you want to "
+                    "save your changes?"))
                   .arg(docname) +
-              tr("<b>Note:</b> If you don't save these files, all changes are "
-                 "lost.<br/>"),
+              "<br/><b>" + _("Note:") + "</b>" +
+              _("If you don't save these files, all changes are "
+                "lost.") +
+              "<br/>",
           QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
     }
     if ((result == QMessageBox::Save) || (!askToSave)) {
-      if (filePath == "") {
+      if (filePath.isEmpty()) {
         // QString docname = tabWidget->tabText(tabWidget->currentIndex());
         // docname.remove(0,2);
         return slotSaveAs();
@@ -398,8 +409,11 @@ void TextEdit::loadFile(const QString& fileName) {
   QFile file(fileName);
   if (!file.open(QFile::ReadOnly | QFile::Text)) {
     QMessageBox::warning(
-        this, tr("Application"),
-        tr("Cannot read file %1:\n%2.").arg(fileName).arg(file.errorString()));
+        this, _("Warning"),
+        (boost::format(_("Cannot read file %1%:\n%2%.")) %
+         fileName.toStdString() % file.errorString().toStdString())
+            .str()
+            .c_str());
     return;
   }
   QTextStream in(&file);
@@ -409,7 +423,7 @@ void TextEdit::loadFile(const QString& fileName) {
   slotCurPageTextEdit()->setFilePath(fileName);
   tabWidget->setTabText(tabWidget->currentIndex(), strippedName(fileName));
   file.close();
-  // statusBar()->showMessage(tr("File loaded"), 2000);
+  // statusBar()->showMessage(_("File loaded"), 2000);
 }
 
 QString TextEdit::strippedName(const QString& fullFileName) {
@@ -434,7 +448,7 @@ void TextEdit::slotPrint() {
   }
   document->print(&printer);
 
-  // statusBar()->showMessage(tr("Ready"), 2000);
+  // statusBar()->showMessage(_("Ready"), 2000);
 #endif
 }
 
diff --git a/src/ui/widgets/TextEdit.h b/src/ui/widgets/TextEdit.h
index beebc8c4..3cff74e7 100644
--- a/src/ui/widgets/TextEdit.h
+++ b/src/ui/widgets/TextEdit.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
diff --git a/src/ui/widgets/VerifyKeyDetailBox.cpp b/src/ui/widgets/VerifyKeyDetailBox.cpp
index 97f792b1..7c25d593 100644
--- a/src/ui/widgets/VerifyKeyDetailBox.cpp
+++ b/src/ui/widgets/VerifyKeyDetailBox.cpp
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -36,17 +36,17 @@ VerifyKeyDetailBox::VerifyKeyDetailBox(QWidget* parent, KeyList* keyList,
   switch (gpg_err_code(signature->status)) {
     case GPG_ERR_NO_PUBKEY: {
       this->setTitle("A Error Signature");
-      auto* importButton = new QPushButton(tr("Import from keyserver"));
+      auto* importButton = new QPushButton(_("Import from keyserver"));
       connect(importButton, SIGNAL(clicked()), this,
               SLOT(slotImportFormKeyserver()));
 
-      this->setTitle(tr("Key not present with id 0x") + signature->fpr);
+      this->setTitle(QString(_("Key not present with id 0x")) + signature->fpr);
 
       auto grid = new QGridLayout();
 
-      grid->addWidget(new QLabel(tr("Status:")), 0, 0);
-      // grid->addWidget(new QLabel(tr("Fingerprint:")), 1, 0);
-      grid->addWidget(new QLabel(tr("Key not present in keylist")), 0, 1);
+      grid->addWidget(new QLabel(QString(_("Status")) + _(":")), 0, 0);
+      // grid->addWidget(new QLabel(_("Fingerprint:")), 1, 0);
+      grid->addWidget(new QLabel(_("Key not present in key list")), 0, 1);
       // grid->addWidget(new QLabel(signature->fpr), 1, 1);
       grid->addWidget(importButton, 2, 0, 2, 1);
 
@@ -54,91 +54,96 @@ VerifyKeyDetailBox::VerifyKeyDetailBox(QWidget* parent, KeyList* keyList,
       break;
     }
     case GPG_ERR_NO_ERROR: {
-      this->setTitle("A Signature:");
+      this->setTitle(QString(_("A Signature")) + ":");
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
     }
     case GPG_ERR_CERT_REVOKED: {
       this->setTitle("An Error Signature");
-      vbox->addWidget(new QLabel(tr("Status: Cert Revoked")));
+      vbox->addWidget(
+          new QLabel(QString(_("Status")) + ":" + _("Cert Revoked")));
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
     }
     case GPG_ERR_SIG_EXPIRED: {
       this->setTitle("An Error Signature");
-      vbox->addWidget(new QLabel(tr("Status: Signature Expired")));
+      vbox->addWidget(
+          new QLabel(QString(_("Status")) + ":" + _("Signature Expired")));
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
     }
     case GPG_ERR_KEY_EXPIRED: {
       this->setTitle("An Error Signature");
-      vbox->addWidget(new QLabel(tr("Status: Signature Expired")));
-      vbox->addWidget(new QLabel(tr("Status: Key Expired")));
+      vbox->addWidget(
+          new QLabel(QString(_("Status")) + ":" + _("Key Expired")));
+      vbox->addWidget(
+          new QLabel(QString(_("Status")) + ":" + _("Key Expired")));
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
     }
     case GPG_ERR_GENERAL: {
       this->setTitle("An Error Signature");
-      vbox->addWidget(new QLabel(tr("Status: General Error")));
+      vbox->addWidget(
+          new QLabel(QString(_("Status")) + ":" + _("General Error")));
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
     }
     default: {
       this->setTitle("An Error Signature");
-      this->setTitle(tr("Status: Unknown Error"));
+      this->setTitle(QString(_("Status")) + ":" + _("Unknown Error "));
       auto gird = createKeyInfoGrid(signature);
       if (gird != nullptr) {
         vbox->addLayout(gird);
       } else {
-        vbox->addWidget(new QLabel(tr("Key Information is NOT Available")));
+        vbox->addWidget(new QLabel(_("Key Information is NOT Available")));
         if (signature->fpr != nullptr) {
-          vbox->addWidget(
-              new QLabel(tr("Fingerprint: ") + QString(signature->fpr)));
+          vbox->addWidget(new QLabel(QString(_("Fingerprint")) + ": " +
+                                     QString(signature->fpr)));
         }
       }
       break;
@@ -168,48 +173,48 @@ QGridLayout* VerifyKeyDetailBox::createKeyInfoGrid(
   GpgKey key = GpgKeyGetter::GetInstance().GetKey(signature->fpr);
 
   if (!key.good()) return nullptr;
-  grid->addWidget(new QLabel(tr("Signer Name:")), 0, 0);
-  grid->addWidget(new QLabel(tr("Signer Email:")), 1, 0);
-  grid->addWidget(new QLabel(tr("Key's Fingerprint:")), 2, 0);
-  grid->addWidget(new QLabel(tr("Valid:")), 3, 0);
-  grid->addWidget(new QLabel(tr("Flags:")), 4, 0);
+  grid->addWidget(new QLabel(QString(_("Signer Name")) + ":"), 0, 0);
+  grid->addWidget(new QLabel(QString(_("Signer Email")) + ":"), 1, 0);
+  grid->addWidget(new QLabel(QString(_("Key's Fingerprint")) + ":"), 2, 0);
+  grid->addWidget(new QLabel(QString(_("Valid")) + ":"), 3, 0);
+  grid->addWidget(new QLabel(QString(_("Flags")) + ":"), 4, 0);
 
   grid->addWidget(new QLabel(QString::fromStdString(key.name())), 0, 1);
   grid->addWidget(new QLabel(QString::fromStdString(key.email())), 1, 1);
   grid->addWidget(new QLabel(beautifyFingerprint(signature->fpr)), 2, 1);
 
   if (signature->summary & GPGME_SIGSUM_VALID) {
-    grid->addWidget(new QLabel(tr("Fully Valid")), 3, 1);
+    grid->addWidget(new QLabel(_("Fully Valid")), 3, 1);
   } else {
-    grid->addWidget(new QLabel(tr("NOT Fully Valid")), 3, 1);
+    grid->addWidget(new QLabel(_("NOT Fully Valid")), 3, 1);
   }
 
   QString flags;
   QTextStream textStream(&flags);
 
   if (signature->summary & GPGME_SIGSUM_GREEN) {
-    textStream << tr("Good ");
+    textStream << _("Good") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_RED) {
-    textStream << tr("Bad ");
+    textStream << _("Bad") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_SIG_EXPIRED) {
-    textStream << tr("Expired ");
+    textStream << _("Expired") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_KEY_MISSING) {
-    textStream << tr("Missing Key ");
+    textStream << _("Missing Key") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_KEY_REVOKED) {
-    textStream << tr("Revoked Key ");
+    textStream << _("Revoked Key") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_KEY_EXPIRED) {
-    textStream << tr("Expired Key ");
+    textStream << _("Expired Key") << " ";
   }
   if (signature->summary & GPGME_SIGSUM_CRL_MISSING) {
-    textStream << tr("Missing CRL ");
+    textStream << _("Missing CRL") << " ";
   }
 
-  grid->addWidget(new QLabel(tr(flags.toUtf8().constData())), 4, 1);
+  grid->addWidget(new QLabel(_(flags.toUtf8().constData())), 4, 1);
   return grid;
 }
 
diff --git a/src/ui/widgets/VerifyKeyDetailBox.h b/src/ui/widgets/VerifyKeyDetailBox.h
index 7a6ded4e..c1b26bb2 100644
--- a/src/ui/widgets/VerifyKeyDetailBox.h
+++ b/src/ui/widgets/VerifyKeyDetailBox.h
@@ -1,7 +1,7 @@
 /**
- * This file is part of GPGFrontend.
+ * This file is part of GpgFrontend.
  *
- * GPGFrontend is free software: you can redistribute it and/or modify
+ * GpgFrontend is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
@@ -33,8 +33,7 @@ namespace GpgFrontend::UI {
 class VerifyKeyDetailBox : public QGroupBox {
   Q_OBJECT
  public:
-  explicit VerifyKeyDetailBox(QWidget* parent,
-                              KeyList* mKeyList,
+  explicit VerifyKeyDetailBox(QWidget* parent, KeyList* mKeyList,
                               gpgme_signature_t signature);
 
  private slots: