Text is English, but voices are still Russian/Polish. Fix: You only replaced text files. You need the soundfiles from an English copy (inside sound/ or zone/ ).
Some versions (often those with RU or PL keys) are locked to a single language and do not show an English option in Steam. To fix this, you must manually replace game files: english+language+pack+for+cod+black+ops+2
: Always source language files from your own backups or reputable community patches to avoid malware or triggering anti-cheat flags (though language swaps rarely affect VAC). Text is English, but voices are still Russian/Polish
Steam will automatically download the necessary language files (the "pack") to update your game. Text is English