In 2024, Activision released a “Steam Update” that broke many non-English zone files. The community responded by creating a unified, multilingual zone pack (version 1.9.2024). If you downloaded your zone files before January 2025, you need to update.
Right-click on and select Properties . Navigate to the Installed Files tab on the left menu. Click the Verify integrity of game files button. cod mw3 all zone files download free