Some feedback about the French version.
First of all it's really cool. Kyatric did a pretty good job at translating pretty much everything.
Everything is pretty smooth, but only if you do everything in French. I've taken some habits to write expressions and search objects in english. So I'd say there should be a tick to allow searching in english too.
(Like if I write "arr" it returns "barre coulissante" (slider bar), "barre de progression" (progress bar), "arrière plan répété" (Tiled Background) AND "tableau" (array))