@elmerot Many refer to it as #Elfdalian in English. So cool to have the association with ”elfs” even if it is coincidental (”älv” meaning ’river’ in Swedish).
#Övdalian is based on the name of the language in the language itself: ”Övdalsk”
Actually it is also now recorded by both names by SIL, even mentioning “Elfdalian” first: https://iso639-3.sil.org/code/ovd