Set Russian language on Alcatel Pop S7 (Android 4.1.2)
MoreLocale 2 from the Play Store might be worth a shot.

Taken from the app listing:


  You can select more locales via this app.
  If your locale doesn't appear, please use custom locale function in menu.


So if you don't see your preferred language in the app, you might have luck specifying something like ru-RU in the app's custom locale wizard.