If missing, copy from a working install or reinstall the Polish language pack.
If you are using a repack version (like FitGirl or DODI), ensure you didn't uncheck the English language pack during the initial installation. Black Ops 2 Sound Bank Failed To Load Cmn-root.polish
He joined. As the countdown hit zero, the soundscape didn't load guns or footsteps. Instead, the "failed" sound bank began to play back fragments of every conversation Marek had ever had over his headset in 2012. Distant laughter of friends long gone, the muffled shout of a younger version of himself, and the ghostly hum of a ceiling fan from a bedroom three houses ago. If missing, copy from a working install or
The "Sound Bank Failed To Load Cmn-root.polish" error in Call of Duty: Black Ops II Black Ops 2 Sound Bank Failed To Load Cmn-root.polish
If using (community client):