I am the author of the Akane imageboard engine. The website is pretty recent and it's hard to find active users, besides some friends to test bugs. However I moslty use my web server as a sandbox place to do some shits in PHP that I don't really take seriously. It's cheap so It will stay online, you are free to use it as you wish.
Imageboards aren't popular at all in France. People use forums most of the time. The most popular one is jeuxvideo.com
Every attempt at making a french speaking imageboard failed, I tried too and I failed as well.
Anyway, thanks for passing by. I'll continue my visit of this website!