Hello Gallacier,
Just passing by, just in case (as I, like you, am working with French): on my side, I use ChatGPT version 4 Pro. In the subscription version, GPT memorizes and “learns” what you do. It retains the content of documents and conversations.
As a result, I provided it with the official and unofficial phoneme dictionaries compatible with Synthesizer V that exist for Chinese, Japanese, English, and Spanish.
Now, I use it to automatically translate French text into phonemes compatible with Synthesizer V. It can even suggest several variations and, more importantly, choose the best language in certain cases (though it should be noted that in most cases, English produces the best results).
If it can help… while we wait to finally have real French voices or ones programmed for French in Synthesizer V (maybe V2 will handle Molière’s language better? :-))
P.S.: I started a topic on French voices in the Synthesizer V section: French vocal/voices for synthesizer v