I CAN'T ADD EXTRA CAPTIONS TO GAME - GAME ISSUES

Black Mesa workers aren’t add Turkish Captions to game so we made a Turkish caption for Black Mesa but i cant add it on game.
How can we add our captions to game ?

Sorry if i opened the entry on wrong subject. I just registered a few minutes ago.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.