For many unofficial releases, you can change the language (including English or Japanese audio) by editing the steam_emu.ini file and modifying the Language= line.

: Updating to v1.20 can sometimes corrupt older save files. It is always wise to back up your Documents/KoeiTecmo/DeadOrAlive6 folder before proceeding. Conclusion

within this underground release, or do you want to dive into the technical "war" between the crackers and the DRM?