The Turkic languages are a
language family of at least 35 documented languages spoken by the
Turkic peoples. While initially thought to be closely related to
Azerbaijani, linguistic studies, particularly those done by
Gerhard Doerfer, led to the reclassification of Khalaj as a distinct non-
Oghuz branch of the Turkic language family. Evidence for the reassignment includes the preservation of the vowel length contrasts found in
Proto-Turkic (PT), word-initial *
h, and the lack of the sound change *
d >
y characteristic of Oghuz languages. The conservative character of Khalaj can be seen by comparing the same words across different Turkic varieties. For example, in Khalaj, the word for 'foot' is
hadaq, while the
cognate word in nearby Oghuz languages is
ayaq (compare
Turkish ). Because of the preservation of these archaic features, some scholars have speculated that the Khalaj people are the descendants of the Arghu Turks.
Ethnologue and
ISO formerly listed a
Northwestern Iranian language named "Khalaj" with the same population figure as the Turkic language. The Khalaj speak their Turkic language and
Persian, and the supposed Iranian language of the Khalaj is
spurious. ==Geographical distribution==