Black Ops 2 Sound Bank Failed To Load Cmn-root.polish [patched]

If you are playing a standalone installer or repack (like FitGirl or SteamRIP) and Method 1 did not work, the game is usually failing because it cannot find the correct activation/instruction files in the root folder. Go into the main directory of the game. Look for a folder named _Language Switcher

Call of Duty: Black Ops 2 (PC, particularly Steam version) Black Ops 2 Sound Bank Failed To Load Cmn-root.polish