Delete or move any non-English localized_xx_iw07.iwd files to prevent conflicts. :
: The primary data file for English text and interface elements. Delete or move any non-English localized_xx_iw07
Create a new folder named english inside the \zone directory. Copy the English zone files into this new folder. Delete or move any non-English localized_xx_iw07
: Essential if you want the dialogue to match the text. How to Install the English Language Pack Follow these steps to manually patch your installation: Delete or move any non-English localized_xx_iw07
Complete Guide to the Call of Duty: Modern Warfare 3 (2011) English Language Pack Patched