Yes, all of the methods described in this guide are free. Steam owners can change the language at no cost. Players with non‑Steam versions can download community‑maintained language packs for free, though caution regarding file sources is advised.
If you own the game on Steam, the easiest way to get the files free is by verifying the integrity of the game files: Open and go to your Library .
Replace the entire localization.txt file as described above.
Once the platform finishes downloading the files, you may need to manually switch the active language inside the game menu. Launch Call of Duty: Modern Warfare 3 . Open the menu (Gear icon). Select Interface .
C:\Program Files\Steam\steamapps\common\call of duty modern warfare 3
: Modifying core game files with unofficial patches can trigger TeamRICOCHET anti-cheat bans.
after an update, leaving voice lines mismatched with subtitles.
: Anti-cheat systems like Ricochet can flag modified or manually injected localized files, resulting in a permanent ban.
Steam will automatically begin downloading the necessary English files. :
: Some physical copies are region-locked to specific languages (like Polish or Italian) and may not support the English pack download. In these cases, changing your system console language
Depending on where you purchased the game, follow the steps for Battle.net or Steam. Battle.net Launcher Open the desktop app.
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: Go to Properties ➔ Installed Files ➔ Verify integrity of game files . Battle.net : Go to the Gear Icon ➔ Scan and Repair . Manage Storage Limitations