A language probably centered around and thus named after the land of Sumer; origins are uncertain, but the first Sumerian texts most likely date from about the end of the 4th millennium. Without any related languages, the ethnic group of its speakers is still unknown, and is commonly referred to as the Sumerian Problem.

By about the year 2000, Sumerian had probably already become a dead language, but was used continually thereafter in Babylon and Assyria as a literary and official language; there seems to be evidence that scribal education was conducted in Sumerian (quite naturally, considering the cuneiform script was only adapted for the Akkadian language). Comparisons are often made with the development of Medieval Latin. Features of Sumerian include: