Hello ;)
This topic caught my interest - and then Google was my friend:

Disclaimer: I cannot and will not take any responsibility if this post (copied from Reddit; orginal post by Reddit user "AllanKempe") is based on facts or not. Also, i am not Swedish or from any other northern European country). So here we go:

" certain NPC says the word "åtett" as a form of greeting

No, can't be. The letter "å" is modern Scandinavian and disregarding that "åtett" looks like no Old Norse word I know.

Kyrkan tittar åtett annat håll"

Typo for "åt ett" - "towards a[n]". "

Hope this helps a bit

MFG
CKTMC