Wolfgang's face flushes bright red, and they turn their head, though they're immediately confronted by their reflection in the dark window and turn their eyes down. “Sorry.” Well, now they feel bad for snapping, and it's probably their own fault for going to such pains to hide it.
They hadn't intended to blurt that out, but now it's out there and they can't take it back, so...
“I'm from Israel.” And finally, their accent makes sense.