Some versions require you to manually edit localization.txt . Open it with Notepad. It should contain a single line like: english Or sometimes: english 1 If it says russian or polish , change it to english , save, and close.
To switch your game to English, you must manually replace specific localization files using guides from community platforms like Steam Community PCGamingWiki Recommended Guides and Methods Call Of Duty Black Ops 2 Pc English Language Pack
“I told you, the pipe isn’t my responsibility!” Some versions require you to manually edit localization
Once you have the English pack running, don't stop there. The PC community has kept this game alive with incredible tools: change it to english