I haven't looked at the empirical literature on the results of that across the United States. There, hopefully, would be scholars who have, and it would be worth looking for their scholarship on the effects of that. There have been various equivalents to ridings designated based on over 5% of the population with indigenous languages and other languages: Asian-American languages, Latino-American languages, etc.
It would be worth looking at that data and what the effects have been for various language communities.