Do Community Answers have Russian interface translation?

There is no Russian translation available, however translating is pretty easy. All you need is translating one language file contains all language strings.

You can find few language translations submitted by CA community here:
http://www.corejoomla.com/forum/40-language-translations.html

[UPDATE] A WIP Russian translation is available on Transifex -
https://opentranslators.transifex.com/projects/p/opentranslators/language/ru_RU/?project=5478
Please contribute to complete the translation.