I believe Russian.SE would benefit greatly from having an alternative Russian interface. Can this be achieved? Does the SE engine allow us to have the same content (FAQ, badge descriptions, page text, etc) in multiple languages? Translating the FAQ and the controls at least should be a priority.
It is our goal to make Stack Exchange a much more multi-national network. Allowing international characters in tags is our first priority, and those development efforts are underway.
But yes, we will provide a localized interface which will allow communities to translate the interface into their native language, but that is further down our "localization" schedule.
Localization is coming, but I do not have any dates report… or even a wildly-arbitrary estimate.