Send with Sam (https://www.sendwithsam.com/) transforms a voice conversation into a personal letter, which can be printed or sent by mail.

“Sam”, a voice assistant with a female voice, is told the recipient and what you want to say by speaking freely.
“Sam” writes the letter from the conversation. Editable generated text (double-click or enter key).

Once the letter has been validated, the service (for a fee) can send it by post, with an address form that offers many countries including France.
Export possible by copying and pasting from the text modification.

Models used not specified. French supported.

Notes: the site claims to be inspired by the film Her (2013), where the hero writes personal letters for others, and takes up the universe: the voice interface is called “OS1”, like the film’s operating system.

15 minutes of conversation without an account and then verification of the email address to get 15 minutes of voice renewed every day.