Qt Internationalization

1. Add translation file to myapp.pro file.
   e.g. TRANSLATION = app_de.ts
2. Run lupdate on the .pro file (in cmd prompt/console) to generate translation sources in XML-based format. lupdate will generate the .ts file for you.
   e.g. lupdate myapp.pro
3. Run Linquist to load the .ts file.
   Put translation strings of your choices there, and then Ctrl+Enter to accept each string.
4. Generate the binary translation file (.qm), so that you can load it at run time.
   lrelease myapp.pro
5. In your code, create a QTranslator object, QTranslator.load(your .qm file), and then QApplication.installTranslator(your QTranslator object)