Even if not solid research, I think that this article is worth sharing as food for though.

The author mentions Duncan’s five faces of poverty (material, social, spiritual, aspirational and identity), then focuses on the later two, and proposes that language also plays a role in social poverty.

Superficially it might seen that the author proposes “replacive bilingualism” (i.e. linguicide) as a solution for this problem; he doesn’t, he is mentioning it to highlight how individuals seek to address this linguistic poverty.

Make sure to give a check to the references cited - there’s a lot of good stuff there.