My suggestion was to keep separated those sections, and that french users creates a parralel thread in english if they want to share thier WIP.( what i've just started)
Lot of french people do not speak english that's the way things are...

Sometimes myself i cannot understand everything when the english level (or it's american ?) raise, especially when some people are joking.
Having some contents or suggestions on his WIPs and being unable to understand it because it's not regular plain old english suitable for an automated translator is really frustating. Being unable to answer also is frustating.
just my 2 cents.