Hello, Hugues!
Please read and respond to the Email in this thread, Looking for Fluent Translators to help Translate Roll20,
https://app.roll20.net/forum/post/1838356/looking-...Also, secondly, you may ask the same question again under
Character Sheets sub-forum. This way you can meet the Sheet Author of the current 3.5 character sheet, and collaborate with them. The character sheets are community-contributed, so you may certainly create a French version of the character sheet and share it in the Character Sheet Repository. Ask in Character Sheets sub-forum to catch the attention of anyone else who might be working on the same idea.
Character Sheets sub-forum,
https://app.roll20.net/forum/category/277980If you would like to recover your Vote from this suggestions thread, you can subtract your +1 from the Triangle at the top, and you may hide this thread by clicking Delete on the first post.
Merci. Thanks for contributing to translations.