I wonder how it would be for an American who doesn't know German, French, or Luxembourgish to reside in that community. To have the locals somewhat be passively interstitial toward outsiders in the center town, it makes me wonder if their perspectives would differ, seeing an outsider in and about the area as their neighbor. That said, the American would need to work earnestly to mitigate their language barrier[s] out of respect for the culture.
