*Default path: C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Black Ops II* Open the folder. Open the DirectX folder inside it. Find the file named DXSETUP.exe . Right-click DXSETUP.exe and select Run as Administrator .
If you are using a repack or specific regional version, the game may include a dedicated tool to fix this. Open the game's main installation folder. Look for a folder named _Language Switcher . Open the English folder inside it. Right-click DXSETUP
and ensure "English" is selected. Steam may need to download a small update. Reinstall All Modes: Look for a folder named _Language Switcher
The error indicates the game cannot find or access its core English audio/sound bank file ( cmn-root.english ). This file is essential for loading dialogue, sound effects, and UI audio. The root causes usually fall into one of three categories: and UI audio.
: Certain digital distributions or custom installers fail to copy the root language text files into the main directory. How to Fix the Error Step-by-Step Method 1: The Language Switcher File Copy (Most Common Fix)
Copy all the contents (usually three .txt files) and paste them into the where the .exe file is located. Choose Replace if prompted. 4. Forced Language Refresh
The sound bank error could be due to a couple of reasons: