I regularly go to Cologne, which is right next to France basically. We actually planned to go to Alsace a couple of years ago during a trip but cancelled it because we liked Germany too much to leave even for a few days.

Luxembourgese is literally a mix of French and German. Apparently the "rule" is that when you're speaking, you choose one language for verbs and the other for nouns or something. It's not exactly random, but it's really weird, that's for sure! Even the newscasters do it, not just the people they interviewed on the news. I assume all the Luxies can speak German and French separately though.