I uploaded it here: VTO+VTH multilingual firmware
I hope the "chinese-portuguese" is better than the "chinese-german"... If you don't like the sounds in your language, you either step back to an old SIP firmware as I did (where you are still able to personalize every sound file!) or you wait for a working V4 firmware, where you are at least able to deactivate the sounds.
Too bad, that dahua does not implement a "sound" upload option. I guess, this would not be hard to implement but it would make this little device the only one on the market with such options.