Some third-party websites offer game language files for download. However, be cautious when using these sites, as they may bundle malware or viruses with the download. Make sure to scan the file with antivirus software before installing.
If you can tell me (Steam, Epic, or another), I can help you find a more direct way to fix the language issue .
If you are using a portable version, you might also run into issues with your campaign configurations.log file to fix mod conflicts in portable setups? Share public link