[Since the invading cat-people from a parallel dimension are naked, having underwear would be a good defense. He could also blind them with his abs and chest.]

Oui. You pick a language up after a while of using it and passing through the countryside where it's used.

[He nods his head in acquiescence.]

Sure, go ahead.

[He blinks at the question. Why would this person want to know? Are they a nation as well? A friend of Belgium's? He looks Luxembourg over quickly.]

We're friends. Why do you ask?