Miluk, also known as Lower Coquille from its location, is one of two Coosan languages. It shares more than half of its vocabulary with Coos proper (Hanis), though these are not always obvious, and grammatical differences cause the two languages to look quite different. Miluk started being displaced by Athabascan in the late 18th century, and many Miluk shifted to Athabascan and Hanis.Miluk was spoken around the lower Coquille River and the South Slough of Coos Bay.