|Qarluq, Southeastern Turkic, Turkestan Turkic|
Uzbek Uyghur Ili
Many Middle Turkic works were written in these languages. The language of the Kara-Khanid Khanate was known as Turki, Ferghani, Kashgari or Khaqani. The language of the Chagatai Khanate was the Chagatai language.
- Uzbek – spoken by the Uzbeks; approximately 44 million speakers 
- Uyghur – spoken by the Uyghurs; approximately 8-11 million speakers 
- Ili Turki – moribund language spoken by Ili Turkis, who are legally recognized as a subgroup of Uzbeks; 120 speakers and decreasing (1980)
- Chagatai – extinct language which was once widely spoken in Central Asia and remained the shared literary language there until the early 20th century.
- Karakhanid – literary language of the Kara-Khanid Khanate that is considered a standard form of Middle Turkic.
- Khorezmian – literary language of the Golden Horde that is considered a preliminary stage of the Chagatai language.
Glottolog v4.8 refers to the Karluk languages as "Turkestan Turkic" and classifies them as follows:
- Austin, Peter (2008). One Thousand Languages: Living, Endangered, and Lost. University of California Press. p. 145. ISBN 978-0-520-25560-9.
- Uzbek at Ethnologue (18th ed., 2015) (subscription required) Northern at Ethnologue (18th ed., 2015) (subscription required) Southern at Ethnologue (18th ed., 2015) (subscription required)
- "Uyghur". Ethnologue. Retrieved 7 December 2022.