I live in Russia right now and everytime I go to the bookstore, I look for Star Trek books in Russian. Unfortunately, I have never found any in Russian. In fact, I don't even know if Star Trek books have ever been translated and sold in Russian.
We had a thread on this about a year ago. I believe there were a lot of Japanese translations in the late 70s and early 80s, along with a Japanese edition of "Starlog".
Ah, here's the thread about foreign language cover art:
And a blog entry by The Trek Collective