To answer myself, I have now transferred #fr.wikipedia to #wikipedia-fr, and #de.wikipedia to #wikipedia-de. I have also transferred the access list and settings of the old channels across to the new ones. I also carried the ban on tor on #fr.wikipedia's autoremove list over to #wikipedia-fr. FennecFoxen is now the channel contact for these two channels. Anthere is the #wikipedia-fr alternate contact and JeLuF is the #wikipedia-de alternate contact.
The old channels, at #fr.wikipedia and #de.wikipedia, redirect to the new channels, so most IRC users won't be adversely affected (except for a few that use one Linux client called Irssi or something like that).
If you want me to make this change for any other channels, I'm more than willing to help out.
~Mark Ryan