All applications do not use any of your personal & non-personal, sensitive information DATA on your smartphone.
they only keep a tiny config file in the application data folder (not external data cards, internal phone storage) where only language information is stored to save the language option for future use. (It can be changed in the settings menu) which simply does the same thing: saving config data.
SPECIAL PERMISSIONS :
There are no special permissions are needed to use any of our applications.
READ&WRITE Internal Storage is asked to you before saving your language option.
If you reject this permission, it might not save the language option.
INTERNET PERMISSION :
Internet connection is not required. All information is stored in your local phone storage. Only several Ads might need an internet connection to be displayed. (not required)