The request [1] is for a North Germanic language [2] spoken in Sweden. There is no Ethnologue page about it, but there is SIL page [3], which indicates it's about a relatively new addition.
It's spoken by ~2000 people, but Sweden is one of the richest countries in the world and I am sure this language has a chance to become a valid encyclopedic language.
[1] https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wikipedia_Elfdali... [2] https://en.wikipedia.org/wiki/Elfdalian [3] http://www-01.sil.org/iso639-3/documentation.asp?id=ovd