I would add in your list an Spanish language (Latinamerican) Female and Male voice so many many spanish language songs can be sing with this excellent Synthesizer V pro software. Instead of changing the voice to another languages to try mimic spanish voices that at the end sound with an english or different pronunciation. This would be great.
This is somewhat the same request that my group and I have made, with serious proposals, directly through emails to Dreamtonics, with the intent of getting new Voicebanks (for us, Italian in particular).
We hope we have succeeded in arousing the due interest and getting the right answers that more or less the whole Latin-speaking community expects.