Delete those original language files and paste the new files you downloaded into the Replace the existing localization.txt in the root folder with the new version. A Quick Warning
Extract the contents of the downloaded English files into your main Black Ops 3 directory. Replace all files when prompted. black ops 3 language switcher download
Note: A known issue with the Simplified Chinese language pack is that it can cause severe when navigating menus or switching skills, particularly if subtitles are enabled. If you encounter this, try disabling subtitles in the Audio settings. Delete those original language files and paste the