If your game installation is missing critical localization files, you can manually download and add them.
For the 2009 version, the "zone" folder contains critical .ff (fastfile) files that control localized text and game data. If you have a non-English version (e.g., Russian), you can manually swap files. cod mw2 zone english folder link download link
Right-click the game > Manage > Browse local files . Default path: C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Modern Warfare 2 . Replace Folder Contents: If your game installation is missing critical localization
: Playing on protected servers with modified or mismatched files can trigger anti-cheat systems, resulting in a permanent ban. cod mw2 zone english folder link download link
Missing "Zone" or "English" folders in Call of Duty: Modern Warfare 2 (2009)