Across forums, less lucky users reported:
The English Language Pack for Advanced Warfare is a for players who own region-locked copies. It functions flawlessly once installed, unlocking the full potential of the game's Hollywood-style campaign. Call Of Duty Advanced Warfare English Language Pack Free
“If you own Call of Duty: Advanced Warfare on Steam, switching to English is free and takes 10 seconds. Go to your Steam Library → right-click the game → Properties → Language → choose English. Steam will download only the needed audio/text files. No third-party downloads required. Across forums, less lucky users reported: The English
You must obtain the "english" folder from a third-party source or a friend's installation and place it in the directory. Call Of Duty Advanced Warfare English Language Pack Free