@yaigor
OHHHHH, I thought you meant that only some sections were not translated...my bad.
The system should be translated. I tested this with latest codebase and I cannot reproduce your issue. Have you refreshed the page and cleared all cache/cookies? Also, have you gone to your Agent Profile and change your Default Language and Locale? Even though you set your system to Russian, if your Agent Profile is still set to English it will appear in English. So make this change and retest.
Cheers.