I'm not aware, at the present time, of others that have made specific moves on this issue after UNDRIP. There may be some of which I'm unaware.
As I mentioned, the United States, even since 1975, has made some efforts around this issue, although in the State of Alaska there had to be litigation around this. There were complexities confronted, partly because of issues of multiple dialects of languages and how those would be used in different parts of a constituency or whether all of those would somehow appear. There were some challenging questions. The United States has made these efforts for decades.
I'm not an expert on the American context. It would be worthwhile drawing significantly upon some of that experience and finding out more about it.