I suggest eligible status for the Wikipedia in Campidanese Sardinian
[1]. It's used primarily for oral communication, but it's a
standardized variety, with literature heritage. [2][3].
[1]
https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wikipedia_Campid…
[2]
https://en.wikipedia.org/wiki/Campidanese_dialect
[3]
https://www.ethnologue.com/language/sro