Copy localization.txt to your desktop. Rename it localization_backup.txt . Never delete it.
Even on PC, the Steam version of Black Ops 3 downloads language packs (French, German, Spanish, etc.) as separate DLC. The English Localization.txt is only active when your Steam client language is set to English. If you switch languages, the game ignores this file and uses a sibling file like localization_french.txt . The biggest frustration with editing this file is Steam Updates . Every time Treyarch pushes a minor patch (for security or anti-cheat), they may include an updated localization.txt . If you have modified yours, Steam will automatically overwrite it, erasing your work. Call Of Duty Black Ops 3 English Localization.txt
For the average player, it is invisible. For the digital archaeologist or the modder, it is a canvas. By understanding how to locate, backup, edit, and troubleshoot this file, you unlock a new level of control over one of the most complex Call of Duty titles ever made. Copy localization