The location and extent of Scythia varied by time, but generally it encompassed the part of Eastern Europe east of the Vistula river and much of Central Asia up to the Tarim Basin. The dominant ethnic groups among the Scythians were nomadic pastoralists of Central Asia and the Pontic-Caspian steppe. Fragments of their speech known from inscriptions and words quoted in ancient authors as well as analysis of their names indicate that it was an Indo-European language, more specifically from the Iranian group of Indo-Iranian languages. Alexander Lubotsky summarizes the known linguistic landscape as follows:
... languages derived their word for slave ... Regarding the other great racial contingent in Eastern Europe throughout antiquity, the Scythians, these were largely nomadic nations who spoke Iranic languages.