Since many rom of Android have not full set of language system ,sometimes it is very hard to set the language you want in your phone.Or if the custom locale function in menu don't support your language,you can try this application !
With ENABLE LANGUAGE application ,it is very easy to change the system language and applications.
Three steps I will move from a system in French to English, without rebooting the system.
1. Open the Enable language App .
2. Search the desired language .
3. Select your language ,and now the language change is made without rebooting your phone.
imporant :Default language feature supports all Android devices (In ANDROID 4.2+ , Only system app can get CHANGE_CONFIGURATION permission.(Changed by Google)).