Hurrian language
Their movement into the region may have set off a Near East mass migration sometime around 1900 BC. The dominant indigenous inhabitants in central Anatolia at the time were Hurrians and Hattians who spoke non-Indo-European languages. Some have argued that Hattic was a Northwest Caucasian language, but its affiliation remains uncertain, whilst the Hurrian language was a near-isolate (i.e. it was one of only two or three languages in the Hurro-Urartian family). There were also Assyrian colonies in the region during the Old Assyrian Empire (2025–1750 BC); it was from the Assyrian speakers of Upper Mesopotamia that the Hittites adopted the cuneiform script. It took some time before the Hittites established themselves following the collapse of the Old Assyrian Empire in the mid-18th century BC, as is clear from some of the texts included here. For several centuries there were separate Hittite groups, usually centered on various cities. But then strong rulers with their center in Hattusa (modern Boğazkale) succeeded in bringing these together and conquering large parts of central Anatolia to establish the Hittite kingdom.