If you downloaded this file from a third-party site (not from the Steam Workshop or official mod tools), scan it with an antivirus. Text files are generally safe, but executable scripts masquerading as text files can be malicious.
Find the localization.txt file in the main folder. Open it with Notepad and change the first line to: english Call Of Duty Black Ops 3 English Localization.txt
In the world of Call of Duty: Black Ops III , the file localization.txt is a critical configuration document that acts as the "language switch" for the game's entire user interface, subtitles, and dialogue. For many players, especially those who have purchased regional versions (such as the RU/CIS version), this small text file is the key to unlocking the full English experience. What is the Localization.txt File? If you downloaded this file from a third-party
Switch the language to something else (e.g., French), wait 10 seconds, and switch it back to . Open it with Notepad and change the first
Some physical disc copies or digital keys purchased in specific regions (like Eastern Europe or Asia) are strictly region-locked. The publishers remove Western language packs from these versions to prevent gray-market key reselling.
. This file is a configuration bridge that tells the game engine which language assets to load from the internal directory. 1. File Function and Location