Even old Mülhausen…
The first Mülhausenite says, in French, “Hi Hans. How’s it going?”
The second replies, “No, Fritz. We are speaking German again.”
Mulhouse, in the region of Alsace-Lorraine was part of France until the Franco-Prussian war on 1870, when the Germans took it. reclaiming this land was one of the key objectives of the French in the early days of the great war. They took it back, but then the Germans took it back three days later, after they got tired of running away from the advancing French.
If this strip had a soundtrack, I think it would be this. Or Yakety Sax.
Thanks a bunch to Ingmar and Loris for the translation.
Update: Loris pointed out that I made a spelling mistake. It should be fixed now.