[HELP] Voices doesn't working

Helow , i have a great idea : put the voices of the game in japanese and have the subtitles in french , but the problem i don’t know how to make this , i tried a tutorial , but i don’t heard the voices of NPC and character , how i make the voices in japanese and reading texts in french ? please help me

Sorry, but there’s no official mod support for this game; this section is for issues running the game as shipped by Gearbox on PC.