linguistic:voice_change, structural:reformatting
Kipchak relationship

It cannot be established whether the Cumans conquered the Kipchaks, if the Śari whom the Quns had defeated were to be identified as Kipchaks, or whether they simply represent the western mass of largely Kipchak-Turkic speaking tribes. The Quns and Śari (whom Czeglédy (1949:47-48,50) identifies with Yellow Uyghurs) were possibly induced into the Kimek union or took over said union and absorbed the Kimek. As a result, the Kipchaks presumably replaced the Kimeks as the union's dominant group, while the Quns gained ascendancy over the westernmost tribes and became Quman (though difficulties remain with the Qun-Cuman link and how Qun became Cuman, e.g. qun + man "the real Quns"? > * qumman > quman ?). Kimeks were still represented amongst the Cuman– Kipchaks as Yimek ~ Yemek.

Potapov writes that:

... during the period from the end of the 800s to 1230 AD spread their political influence in the broad steppes from Altai to Crimea and Danube. Irtysh with its adjoining steppes (at least below the lake Zaisan) was in the sphere of that confederation. Members of the confederation undoubtedly also were the ancestors of the present Kumandy and Teleuts, which is evidenced by their language that like the language of the Tobol-Irtysh and Baraba Tatars belongs to the Kypchak group.