Turkic

The Turkic language family comprises approximately 35–40 languages spoken by around 200 million people across a vast arc from Turkey and the Balkans through Central Asia to Siberia and northwestern China. The family is notable for its extraordinary geographic range, its high degree of mutual intelligibility across many of its members (particularly the Oghuz branch including Turkish, Azerbaijani, and Turkmen), and its association with some of the most consequential steppe empires of the 1st–2nd millennia CE.

Proto-Turkic is reconstructed as having been spoken in or near the Altai Mountains region of southern Siberia and Mongolia, probably in the first few centuries CE or slightly earlier. Ancient DNA from the Eastern Eurasian steppe shows that the peoples associated with early Turkic cultural expansion had a genetic profile mixing East Asian (Mongolian-related) ancestry with smaller components of earlier steppe populations (Saka and Xiongnu-related). The rapid expansion of Turkic languages across Eurasia from the 6th century CE onward was driven primarily by the political and military dominance of Turkic-speaking confederacies — the Göktürks, Uyghur Khaganate, Khazars, Pechenegs, Cumans, and eventually the Seljuk and Ottoman Empires.

The Seljuk and Ottoman expansions carried the Oghuz branch of Turkic into Anatolia, Iran, and Azerbaijan from the 11th century CE onward. In Anatolia, Turkification was a linguistic replacement of a predominantly Greek and Armenian-speaking region, driven by elite takeover, urbanisation, and gradual population movement over several centuries rather than wholesale replacement — ancient DNA from Ottoman-period Anatolia confirms substantial continuity with pre-Turkic Byzantine-era populations. The Ottoman Empire made Turkish the language of administration, law, and prestige across a vast territory from Hungary to Iraq for five centuries.

The Siberian Turkic languages — including Sakha (Yakut), spoken as far north as the Arctic Circle, and Tuvan — document a remarkable northward expansion across some of the world's most extreme environments. Sakha speakers arrived in the Lena River basin around 1000–1300 CE and rapidly adapted to subarctic conditions, developing a distinctive pastoral and horse-herding culture. Their genetic profile combines Turkic steppe ancestry with substantial admixture from Siberian forager populations absorbed during this northward expansion.