Because we cannot provide direct links (due to copyright), here are the types of sources you should search for on Google or archive sites:
This is the story of that pack—why it exists, where to find it, how to install it without bricking your game, and why, twelve years later, players are still hunting for it. Download Modern Warfare 3 English Language Pack
Activision's EULA technically forbids modifying the game's assets or importing files from another region. However, no player has ever been banned from Steam or MW3's old multiplayer servers for using an English pack. The game's anti-cheat (VAC) doesn't scan for language .iwd files; it scans for aimbots. Because we cannot provide direct links (due to
: Right-click Modern Warfare 3 in your library, select "Properties," and go to the "Language" tab to switch to English. Steam will then automatically download the necessary files. The game's anti-cheat (VAC) doesn't scan for language