Akkadian language
The Akkadian Empire, established by Sargon of Akkad, introduced the Akkadian language (the "language of Akkad") as a written language. It used Sumerian cuneiform orthography (writing method) for the purpose. During the middle Bronze Age (Old Assyrian and Old Babylonian period), the language displaced Sumerian. Sumerian probably became extinct as a living language by the 18th century BC.