Due to poor documentation and the absence of any descendant languages, linguists have been prevented from making an accurate classification. It is placed as unclassified in the
Kipchak language family in
Glottolog and in the Kipchak–Cuman language family in
Linguist List.
Byzantine princess
Anna Komnene asserts that the Pechenegs and
Cumans spoke the same language, while Mahmud al-Kashgari considered their language to be a corrupted form of Turkic. Most contemporary researchers conclude that they spoke a
Common Turkic language. ==References==