If the menus are still in another language, you must replace the .bin files in the data/text folder with the English .txt versions. Method 3: Fixing "Missing Text" or UI Issues
The English language data is stored in the data and packs folders. You are looking for: en_localized.pack
If you own the game on Steam, you don’t need to download external files. Steam provides the language packs automatically. and go to your Library . Right-click on Medieval II: Total War . Select Properties . Navigate to the Language tab. Select English from the dropdown menu.
Files within data/text (such as expanded.txt , names.txt , etc.) 2. Replacing the Files
If you have a physical disc or a non-Steam digital version (like an old GOG install or a regional retail copy), you may need to manually swap the localized files. 1. Locate the Language Files