Here are some other options:
* "Adieu": This is a formal way of saying goodbye.
* "Maacht et gutt": This translates to "have a good one."
* "Bis geschwënn": This means "see you soon."
It's worth noting that Luxembourgish is a highly nuanced language, and the best way to say "bye" will depend on the context of the situation and your relationship with the person you are talking to.