Since the official Steam or console versions usually handle this via "Properties > Language," many users looking for a standalone "pack" are often navigating third-party forums.
Xbox uses a "Locale" based system.
Longer (Reddit/Facebook): "Just switched Call of Duty: Ghosts to English. On PC I used Steam → Properties → Verify integrity of game files to download the English language pack; on consoles, set the system language to English or check the game’s Add-ons/Language Packs. Always download language packs from official stores to avoid corrupted files." callofdutyghostsenglishlanguagepack