When you login to the game next, type in the chat line (where you talk to people) .cfg and press enter. A menu will appear with some arrows along the right side. You can click the Eng button on the bottom or the third arrow down on the right and then change the language from Russian to English. There are several other useful features you can find in the Menu. Also in the Options of the game, click the tabs along the top until you see Russian and change this option also to English. These two setting changes have worked for me. If you are having problems with your Map and a few other things still appearing in Russian, you may want to visit this thread:
http://forum.averia.ws/threads/patch-for-eng-map-client-textures.26688/