I want to say that we really liked your game!
We noticed that your game does not have Russian language and would like to offer to make a professional translation into Russian from people studying linguistic sciences. This would help us in our thesis, and also increase the number of users in your game, who are unfortunately hampered by the language barrier.
And this is absolutely free, we will only be glad to have a small mention of us in the credits, so that we have the opportunity to refer to your game in our scientific work.
Hope to hear from you soon.