I have added additional localizations into my iOS app. iOS is not available in those languages. So I did as it is suggested that you redirect customers to app settings view UIApplication.openSettingsURLString and there they can select another app language.
Unfortunately they do not see language selection if they do not have set at least 2 Preferred languages in General -> Languages & Region. Also it does not matter what languages they have there. If my app does not support those then it still shows all localizations available.
Is there somehow to force it? So it would be visible always? Since most people in my country have iPhones only in English but would like to use Apps in their native language.. Since they do not have 2 preferred languages they cant see the selection :(