Downloading the English language pack for Modern Warfare 3 (MW3) is generally straightforward across major platforms, though the massive file size of Modern Warfare titles remains a common point of contention for players.
Why?
Check the "English" language pack if it appears as an uninstalled add-on and select to begin the download. Changing Language In-Game Download Modern Warfare 3 English Language Pack
If you bought a Russian "Region Free" CD key for $19.99 instead of the US price of $59.99, you were implicitly agreeing to play with Russian text and voiceovers. The problem? Many of those keys weren't actually "locked." You could activate them globally, but the game would default to the region's native language. Suddenly, the iconic "Ramirez! Protect the burger town!" became a stream of Cyrillic or guttural German commands. Downloading the English language pack for Modern Warfare