If you installed the game with your language PLUS English – you shouldn’t face any problem. The problem is in game, which forces itself to English on each launch if it sees English files inside. And doesn’t launch properly if it doesn’t see 2 English files even if another language is selected.

Hidden in the towering Himalayas lies Kyrat, a country steeped in tradition and violence. You are Ajay Ghale. Traveling to Kyrat to fulfill your mother’s dying wish, you find yourself caught up in a civil war to overthrow the oppressive regime of dictator Pagan Min. Explore and navigate this vast open world, where danger and unpredictability lurk around every corner. Here, every decision counts, and every second is a story. Welcome to Kyrat.

If you want to play in your language, but with English voiceovers, install the game with English files and then change the UI language in-game.

But generally I wouldn’t recommend it. I’ve tested single-player campaign, of course and found no bugs or glitches with MP-files removed, but they MAY appear later in the game.

This repack IS NOT backwards compatible with my first FC4 repack, all archives were recompressed.