Sumerian

Sumerian was the language of ancient Sumer. It is the oldest attested language, dating back to at least 3100 BC, perhaps earlier. It is a local language isolate, thus unrelated to any other known language, that was spoken exclusively in ancient Mesopotamia, in the area that is now modern-day Iraq.

Sumerian is read from left to right, from the top; however early inscriptions were read top to bottom from the right.

Akkadian, a Semitic language, gradually replaced Sumerian as the primary spoken language in the area c. 2000 BC (the exact date is debated), but Sumerian continued to be used as a sacred, ceremonial, literary, and scientific language in Akkadian-speaking Mesopotamian states, such as Assyria and Babylonia, until the 1st century AD. Afterwards, it seems to have fallen into obscurity until the 19th century, when Assyriologists began deciphering the cuneiform inscriptions and excavated tablets that had been left by its speakers.

From Wikipedia · Sumerian language · CC BY-SA 4.0