The error in Call of Duty: Black Ops II is a common issue that occurs when the game client cannot find or access necessary language-specific audio files. This typically happens due to mismatched language settings between the game files and the configuration, or missing language packs after an installation. 1. Change the Localization Setting
The "Sound Bank Failed To Load Cmn-root.polish" error in Black Ops 2 Black Ops 2 Sound Bank Failed To Load Cmn-root.polish
Call of Duty Black Ops II\zoneIf you are using a version of the game that includes a _Language Switcher folder: "Sound Bank Failed To Load Cmn-root