. Instead, changing the language is typically handled through Steam's built-in settings or by manually replacing localization files. Standard Method (Steam)
Be cautious when downloading files from unofficial sources like or Mediafire links found in black ops 3 language switcher download
If you are having trouble getting a specific language to appear in the Steam menu, I can help you or check if your version of the game (e.g., Russian/Polish region-locked) supports other languages. Steam and Games - Language Settings black ops 3 language switcher download