Since NBA 2K11 was released in 2010 (primarily for PS3, Xbox 360, PC, Wii, and PSP), it does not have a simple in-menu language switcher like modern games. Most physical discs are region-locked to one language (e.g., a French disc stays in French).
If your game is displaying in Russian or another language you do not understand, it is almost certainly a Windows Registry issue. Many pirated or repacked versions of the game default to Russian settings in the registry. how to change language in nba 2k11 link
Go to the Settings option. Once Steam restarts, you will be able to use Steam and Valve games in the language which you selected. Steam Support How to Change Language on Steam and Games Since NBA 2K11 was released in 2010 (primarily
Xbox 360: Go to System > Console Settings > Language and Locale > Language. Restart the console or game for changes to take effect