Given that you obviously speak the language, you are more than welcome to work on the translation yourself (that's the whole point if this). Go to http://www.lojban.org/twiki/bin/view/Translations/Lojbanorg There are two old French translations at the bottom that you can use (which is where I got the "Qu'est-ce que" line from).
Nice! I have started the translation. Jérôme. Liste de dicussion en français sur le lojban, langue construite. Pour se désabonner : mailto:lojban-fr-request@lojban.org?subject=unsubscribe Autres informations : http://lojban.free.fr