@MusicVillain
Praat is free: https://www.fon.hum.uva.nl/praat/download_win.html

Each voice can also sing multiple languages. All words are translated into sound parts and transitions of these parts.
You can download the trial at https://dreamtonics.com/synthesizerv/
receive.

The paid version then has vst, script, AI functions, better voice selection, more tracks, faster rendering and one or the other that I can't think of right now wink.

Each voice bank is around $80 USD and so is SynthV Pro (comes with Mai Japanese voice bank free).
Natalie, Asterian; Kevin and Solaria were recorded in English, Mai has a small? accent.

Soon the program will also be able to rap. I think the beta will come soon.