If the error persists, force Steam to clear its localization cache:
Copy all files located inside this folder (there are typically ).
Copy all files found inside this folder (usually three configuration text files or registry scripts). black ops 2 sound bank failed to load cmnrootenglish link
For a visual walkthrough on fixing language and sound bank loading errors, you can watch this guide:
A Reddit user on r/PiratedGames posted a fix for the error "sound bank failed to load cmn_root.polish" when running *Call of Duty: If the error persists, force Steam to clear
Right-click on and select Properties . Click on the Installed Files tab on the left-side menu. Click the Verify integrity of game files button.
Paste the files directly into the root folder. Select if prompted. Relaunch the application. Method 2: Steam Client Language Sync (Official Version Fix) Click on the Installed Files tab on the left-side menu
If you downloaded the game from another site, it often uses a tool called a language switcher. You must move these files by hand.
How to Fix " Black Ops 2 Sound Bank Failed to Load cmn_root.english"