This last group is all pretty well understood here, alhtough I don't see many people using salle à manger, sans, supermarché and Weihnachten (if they're not talking to a Frenchman or German of course).
Wurst neither, although 'bratwurst' is used. And 'que sera' is French as well (without the accent of course, but well, you don't hear those if it's blared from the football stands
).