Change Language Enabler This application let you choose the language you want to run for the apps and system.
language application activat samsung keyboard languages "language input". Since many rom of Android have not full set of language system if the custom locale function in menu don't support your language you can try this application !

This application supports more than 100 languages variants supports all languages / locales: Farsi Arabic Chinese Indian Spanish French Old French Hebrew Farsi Albanian Ancient Greek Catalan Esperanto Galician French Hebrew Hiligaynon Hungarian Icelandic Ido Irish Kashubian Latin Lithuanian Lower Sorbian Italian Sorbian Mapudungun Polish Portuguese Russian Romanian Spanish Upper Chinese lenguaje español para android
عربية، عبرية، فارسية

This App Will Tell You How To Change Language On Android change language chinese to english language backto English Android
Easy to change you android device's language to any Locale Language in the world.

Starting with Android 4.1 the permission to change your language system became protected and language input.

you are familiar with Android tools developments? then you can grant the required permission to the App without Root Execute this command through usb "adb -d shell pm grant gamego.Language android.permission.CHANGE_CONFIGURATION"

Set Locale language to any other language you want
With Root:
If you have Root access on your device then Language phone can automatically do the work for you. by acquiring the required permission to set up your language.