This game only plays voices if it can use the Steam API to geolocate your IP to an Asian country (didn't look at the full list). Since this post uses a Steam API emulator that doesn't support changing the result of geolocation, I fixed the game to play voices everywhere.
Download https://pixeldrain.com/u/cg6TZxiS, decompress the .7z, and replace the game's GameAssembly.dll with the one you downloaded.
Thanks a lot for uploading Ignition. I had https://vndb.org/v7633 this in my hard disk but now when I started to play it, it seems to be not working :(
So, do you also perhaps have this with all dlc/update?