For question about the Sumerian language, an Ancient language used from the 3rd millenium BCE upto the 1st century CE in the Iraq.

The Sumerian language is considered an isolate language, no external relation could be demonstrated.

It was wirtten in cuneiform script and extant bilingual wordlists of Sumerian and Akkadian (a Semitic language) exist. Long after its death Sumerian was continued as a classical language.