Documentation
The earliest observations about the language were published by P. S. Pallas in 1788 in a travel diary (Путешествия по разным провинциям Русского Государства Puteshestviya po raznim provintsiyam Russkogo Gosudarstva). In 1858, M. A. Castrén published the first grammar and dictionary (Versuch einer jenissei-ostjakischen und Kottischen Sprachlehre), which also included material on the Kot language. During the 19th century, the Kets were mistaken for a tribe of the Finno-Ugric Khanty. A. Karger in 1934 published the first grammar (Кетский язык Ketskij jazyk), as well as a Ket primer (Букварь на кетском языке Bukvar' na ketskom jazyke), and a new treatment appeared in 1968, written by A. Kreinovich.
E. Alekseyenko has written a historical-ethnological treatment of the Kets (Кеты Kety, 1967). Western Washington University historical linguist Edward Vajda offers better substantiated findings into the origins of the Ket people, where DNA claims show genetic affinities with that of Tibetan, Burmese, and others. Edward Vajda spent a year in Siberia (2005–2006) studying the Ket people, and finds a relationship of Ket language to that of Native American Na-Dene languages, and also suggests the tonal system of the Ket language is closer to that of Vietnamese than any of the native Siberian languages. His (2004) monograph Ket is the first modern scholarly grammar of the Ket language in English. (Lueders 2008)
Read more about this topic: Ket Language