Proto-Yeniseian language

Proto-Yeniseian or Proto-Yeniseic is the unattested reconstructed proto-language from which all Yeniseian languages are thought to descend from. It is uncertain whether Proto-Yeniseian had a similar tone/pitch accent system as Ket. Many studies about Proto-Yeniseian phonology have been done; however, there are still many things unclear about Proto-Yeniseian. The probable location of the Yeniseian homeland is proposed on the basis of geographic names and genetic studies, which suggests a homeland in Southern Siberia.