Answer
The Golden Horde was a large Turkic-Mongol state that was founded by Batu Khan in 1227. The Golden Horde was based in the Pontic-Caspian steppe and was one of the four major khanates of the Mongol Empire. The language of the courts of Batu Khan's Golden Horde was Mongolian. This was because Batu Khan was a Mongol and Mongolian was the language of the Mongol Empire.