How to implement internationalization and localization support in PyQt5?

Internationalization and localization support can be implemented in PyQt5 by following these steps:

  1. Create translation files using the Qt Linguist tool.
  2. Use the pylupdate5 command in the project to generate .ts files that contain the text needing translation.
  3. Open the .ts file with the Qt Linguist tool, translate the text one by one, and save it as a .qm file.
  4. Load translation files using the QTranslator class in Python code.
  5. Import QTranslator from PyQt5.QtCore
    Create an instance of QApplication with sys.argv
    Instantiate a QTranslator object
    Load the translation file ‘translation_fr.qm’ into the translator object
    Install the translator into the application
  6. Add the text that needs to be translated in the UI widget.
  7. Set the label to display the translated text “Hello World”.
  8. Load the corresponding translation file based on the user’s preferred language setting.
  9. import locale
    locale.setlocale(locale.LC_ALL, ”) # Retrieve the user’s locale settings
    lang = locale.getdefaultlocale()[0]
    translator = QTranslator()
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