If you use the Plutonium client for BO2, they provide built-in support and verified assets for language switching. If you'd like, I can help you:
The Russian version uses common_ru.pak . You will need the English equivalent ( common_en.pak ) located in the main directory to hear English dialogue and announcer voices. How to Install the Language Pack Safely
The English localization files (LPS and PAK) are physically absent from the Russian installation. If you use the Plutonium client for BO2,
You need to replace the files in your zone/russian folder with those from the zone/english folder. Key files include: en_ui.ff en_common.ff en_patch_ui.ff 2. Sound Banks
If you are trying to switch your Call of Duty: Black Ops 2 interface and audio from Russian to English, you’ve likely encountered the region-lock issues common with Steam copies purchased in Eastern Europe. How to Install the Language Pack Safely The
Find the for the Zombies mode specifically. Troubleshoot a "Menu Content Not Found" error.
Follow these steps to ensure the transition is seamless and doesn't break your multiplayer access: Sound Banks If you are trying to switch
Guide you on setting up the for a better experience.