Why did Akkadian become an international written language in the ancient Middle East?

Akkadian became an international written language in the ancient Middle East primarily because it served as a lingua franca for diplomatic and political communication throughout the 2nd millennium BCE.1

The rise of Akkadian as a universal medium was closely tied to the influence of Babylonia, which became a central hub of Mesopotamian culture. As the Akkadian language gained literary prestige, it was adopted by various powers across the region. This status is evidenced by the Amarna Letters, a cache of diplomatic correspondence from the 14th century BCE between the Egyptian court and other great powers, such as the Hittites, which were written in Akkadian despite it being the native language of neither party.1234

By utilizing the cuneiform writing system—originally developed by the Sumerians—Akkadian provided a standardized script that allowed for consistent record-keeping and communication across diverse linguistic groups, including the Hurrians and Elamites. This system remained the standard for international intercourse until it was eventually replaced by Aramaic.124