I'm afraid only English is available for OnDemand right now.
We do have a feature request to support other languages though:
Please sign up for an account and vote for and comment on the issue so we can gauge interest!
You can find all supported languages here: https://confluence.atlassian.com/display/AOD/Language+Support+in+Atlassian+OnDemand
Unfortunately Russian is still not supported. We strongly suggest you to vote on the issue below in order to expedite its resolution.
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