The Dīwān Lughāt al-Turk (Arabic: ديوان لغات الترك, lit. 'Compendium of the languages of the Turks') is the first comprehensive dictionary of Turkic languages, compiled in 1072–74 by the Turkic Kara-Khanid scholar Mahmud Kashgari who extensively documented the Turkic languages of his time. Source: Wikipedia (en)