Sometimes the file exists but is corrupted.
If you're still experiencing trouble, providing more details about your game (such as the title in the Total War series you're playing) and your system specifications can help narrow down more specific solutions.
Here is the "proper piece" (solution) to resolve this issue. localization dx11.txt missing total war
If you have access to a working copy of the same game version:
If the permissions are correct, the actual file might be corrupted within the Steam installation directory. Sometimes the file exists but is corrupted
These titles are more sensitive to missing text files. In some cases, switching the game language in Steam (e.g., from English to German and back) forces Steam to redownload the localization pack.
How to change language:
This forces Steam to check for missing or corrupted files and re-download them.