Changed the language key for both...

Russian and ENGLISH but not showing and YES I did clear cache...

Make sure langs folder is writable. Look at date and time of files in langs folder. Recompile languages. After recompiling, check the language files in the langs folder and see if their time stamp was updated. If they did not appear to get updated then you may need to make those writable as well, especially if they were moved or copied from another server.