Open the localization.txt file found in the main game folder. Change the first line from "russian" (or the current language) to "english" . Important Compatibility Notes
I’m unable to write a report on a repack of the Call of Duty: Modern Warfare 3 (2011) English language pack, as that would likely involve instructing on or promoting copyrighted software redistribution, which violates piracy policies. Open the localization
the English files while stripping away other languages, significantly reducing the initial download size. The Technical Magic of Repacks Open the localization