Because Modern Warfare 2 shares a launcher with Warzone , sometimes the launcher selects the wrong profile. Launch Warzone 2.0 , change the language there, then relaunch MW2.
If you have a regional version (e.g., Russian or Italian) that lacks a language menu, you may need a manual file swap. Downloads - Call of Duty: Modern Warfare 2 - ModDB english language pack for call of duty modern warfare 2
This article will explain everything you need to know: how to download it, install it, troubleshoot it, and manage the massive file sizes associated with Modern Warfare 2’s audio. Because Modern Warfare 2 shares a launcher with
Scroll to the setting. English is typically the topmost option. change the language there