I opened the settings in the Blizzard launcher and went to change the audio to Chinese, while keeping the text in English. I clicked “Done” then launched the game. Didn’t work. I tried this a few times. Still didn’t work. Then I performed the “Scan and Repair”. Once again, didn’t work.
I’ve tried Googling the issue and wasn’t able to find anything. If anyone can help, it would be greatly appreciated.