IN 1882, linguists were electrified by the publication of a lost language—one supposedly spoken by the extinct Taensa people of Louisiana—because it bore hardly any relation to the languages of other Native American peoples of that region. The Taensa grammar was so unusual they were convinced it could teach them something momentous either about the region’s history, or the way that languages evolve, or both…

This article was first published in Slate on 30 October 2019. To continue reading, click here.