IDK if there should be a thread or not, but a fan group called Millefeuille has been releasing their French Diffsinger banks with nice demos, tutorials, different French accents, English and hiragana phonemizers, etc. It's really nice and any French fans should check it out!
Here: Other - French AI Synthesizer Millefeuille
(I was going to add the videos but I've fallen in the stairs so in the end I could do nothing yet ;w;"' )