How do Chinese players choose Japanese voice packs

I am a battlefield player from China. When I watched the live broadcast today, I found that the game has Japanese voice packs.The Japanese voice packet sounds very interesting .However, there is no Japanese option in the sound effects of My Battlefield 1 and Battlefield 5,How can I add Japanese sounds ?

    If yes, can you tell me the download address or how to choose,Sincerely hope for your reply!

(Remove non supported language to clean the post up) - Atic