More language in app means more potential users.

I think it Can be cool if you provide a list of all strings in the app Somewhere on the copiosa website or app and users Can give the translation in their language, ofc you need multiple validation for a translation but i think it Can help a lot with the internationalization of the app for free (or cheap if you choose to reward the translators).

Plus users should be able to change language of the app throught the system settings in the profile tab.