Open the localization.txt file in your main directory. Change the first line from your current language (e.g., russian ) to english and save the file. Alternative Fixes for Steam Users
Here is a solid guide covering the best methods to get the English language working in BO3. cod black ops 3 english language pack top
: Because there was no official "download" button for the English pack in these regions, a "shadow market" emerged on forums like Open the localization