I would suggest you something else:
Use the
AHLocale library from corwin42 and get the devices' default language and use this one the first time. Define a setup activity where you can select any other or 'automatic' (default device language). Save a Setup file in Activity_Pause.
Read the Setup file in Activity_Resume and set the different parameters, language included.
You can have a look at the
Simple NotePad project.
Best regards.