Added RU language in supported languages (#541)
Added RU language in supported languages (#541)

- We want to allow using the Russian language translation
codecombat/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat