Pretty interesting! I tried this both English -> French and French -> English.

English -> French seemed to work best, with the AI output have a very similar timbre to my real voice. Not hyperrealistic for me, but decent enough given I gave it a ~20s sample.

French -> English was less good in terms of the timbre and pitch of the voice---way higher than my real voice. It did have a bit of a Canadian accent, though, which is funny because I speak French with a Quebec accent. Maybe that's what I would sound like if I had a Canadian accent in English?