I would like to know if PIllusion will be available in french or not.
... and if you have some news about an update for the Mac version (MacIntel native compatibility) or if we must wait for PIllusion V4...
We don't have a French version right now, but in the future, yes. Can't say what version though. One of our resellers in France (http://www.swish.fr/ I believe) may have converted the manual for particleIllusion to French for their customers.
We are working on a Mac Intel version, and hope to have it ready in the next couple of months. It will be a free upgrade of course. No new features, just an Intel version.