i18n with QT

main.py

@@ -1,10 +1,11 @@
 import logging
+import os
 import signal
 import ctypes
 
 from PySide6 import QtCore
 from PySide6.QtWidgets import QApplication
-from PySide6.QtCore import QTimer
+from PySide6.QtCore import QTimer, QLibraryInfo, QTranslator, QLocale
 from PySide6.QtGui import QIcon
 import sys
 
@@ -40,6 +41,17 @@ if __name__ == "__main__":
     # if translator.load(QLocale("de"), "messages_de.ts"):
     #    app.installTranslator(translator)
 
+    locale = os.environ['LANG'] if os.environ['LANG'] else "en"
+
+    path = QLibraryInfo.location(QLibraryInfo.TranslationsPath)
+    translator = QTranslator(app)
+    if translator.load(QLocale(locale), 'qtbase', '_', path):
+        app.installTranslator(translator)
+    translator = QTranslator(app)
+    path = './translations'
+    if translator.load(QLocale(locale), 'messages', '_', path):
+        app.installTranslator(translator)
+
     # workaround to make signals work in QT apps.
     # They do not work out of the box, because the main thread
     # is running in C++ code once app.exec() is executed
@@ -55,6 +67,8 @@ if __name__ == "__main__":
     PluginRegistry.load_plugin("LogFilePlugin")
     PluginRegistry.load_plugin("NotesPlugin")
 
+    PluginRegistry.execute("set_translator", lambda string: translator.tr(string))
+
     window = PluginRegistry.execute_single("create_main_window")
     RavenUI.window = window
     window.show()