This website is a french-speaking imageboard that has its own small subculture differing from, though sometimes overlapping with, other imageboards'. If you can't read or write in French at all go to /int/, but be warned, it is rather slow. If all you want is to make contentless posts on some random board, just don't bother posting, your posts will quickly be deleted.
what's so special about it
it's a successor to underfoule.net which was a really good and funny board before it closed down
the culture is anti-4chan so it's a lot like here, but people started arguing over politics and stuff like saying the nigger word and the site became increasingly dead over the last few years (sound familiar ?)
hate it when that happens