I have been in touch on StackOverflow with someone who have this problem : App Store review rejected - app permission request language

This is not the same : here the app does not decide what language it is running it. It is all done through settings which are built into iOS. Via iOS API, the app can display all its interface in the language chosen by user and iOS decide which language app should use : the one in app/language . It has no choice. The fact is that iOS system alert seems to use the language from device. In the program , the localize interface will give you result from app language.