Intergalactic Common

Intergalactic Common, or just Common, is the standard language of most sentient life in the universe.

Qabu
Common stems from ancient Qabu, which was the original language of the universal majority and the first Tellurian language. Brought to Tellus and gifted to humanity, Qabu was the father of all spoken and written language on Tellus. It was a formal and literal language with many technical words that lacked emotion and sensory detail. As humans began using Qabu and letting it evolve, species who watched or had interactions with Tellus began adopting human modifications to the language, often finding their advancements to be "colorful" and amusing enhancements. Some purists find modern Common to be tainted or crude, so Qabu and offshoots of the language are still used in parts of the universe.

Modern Common
A mixture of humans influencing Qabu and extraterrestrials effecting Tellurian languages has led to modern common being nearly identical to the English, which had slowly become global language in Tellus history. As Tellurian slang is ever-changing, it is a barrier between English and Common, just as most species have terms specific to their planet.