If you downloaded a "Repack" (like from fitgirl-repacks, RG Mechanics, or similar sites), the Russian text might not be a setting, but actually missing English files.
If you can navigate the Russian menus, look for the following: Настройки (Settings) -> Параметры (Features/Options) -> (Language). Look for the 15th bar down in some 2K menus to find the Menu Language nba 2k11 russian to english new