Far Cry 4 English Language Pack is a set of files that allows players to use English text and audio in the game. This is often needed by players who purchased a version of the game locked to a different language (such as Russian or Chinese). How to Change the Language
3. Fixing Region-Locked Versions (Russian/Polish to English)
The Stealth Launch:
Some players used custom scripts ( .bat files) to "hide" these files from the Uplay launcher during its initial check, then swap them back in seconds before the game actually starts.