The earliest language written in Mesopotamia was Sumerian, an agglutinative language isolate. Akkadian, came to be the dominant language during their rule, but Sumerian was retained for administration, religious, literary, and scientific purposes

The Dravidian languages are a language family spoken mainly in southern India and parts of Sri Lanka. They are known for their agglutinative nature, which means that words are formed by adding prefixes or suffixes to a root. They also have a wide range of sounds and intricate grammatical structures.

Korean is unique in its writing system, which uses a combination of phonetic characters and Chinese characters. It's also known for its hierarchical speech levels that vary based on the social status of the speaker and listener. Additionally, Korean grammar is agglutinative, meaning that multiple pieces of information can be expressed within a single word through suffixes.

Baghdad was founded in the eighth century by the Abbbasid Caliphs. It was from its foundation an Islamic city, in an area where both Arabic and Persian were spoken. The name if the city is probably of Persian origin.