If you downloaded the entire zone folder from a torrent without owning the base game (including .exe and main folders), you crossed into piracy. The legal gray area existed only if you already had the game installed and were merely replacing localization files. Activision's legal team historically auto-scanned public torrents, focusing on full-game packs, not language patches.
Select from the dropdown menu. Steam will automatically download the necessary files (approx. 7GB). If you downloaded the entire zone folder from
: Ensure the localization.txt file is set to "english". Common Issues Noted by Users focusing on full-game packs