Later, as an experienced linguist, he published some studies of Penutian languages and the classification of Athabaskan languages. |
The Penutian language group of Western America is related to the languages of the Maya and the Zoque of Mesoamerica. |
They speak a Sahaptian dialect of the Penutian language family, which is common among other Plateau groups in the mid-Columbia River region. |
The Costanoans spoke Penutian and lived along California's Central Coast. |