From en.wiktionary.org:
[sitten]
** German
[lang=de]
*** Pronunciation
- [de]
*** Etymology 1
**** Proper noun
[toponym]
1. [de]
*** Etymology 2
**** Noun
[de]
1. [de]
*** Further reading
- [R:de:DWDS]
- [R:de:Duden]
- [R:de:UniLeipzig]
** Luxembourgish
*** Noun
[lb]
1. [lb]
** Plautdietsch
*** Etymology
From [pdt], from [pdt], from [pdt].
*** Noun
[pdt]
1. habit , custom , manner
2. fad