Unispeak

Unispeak, based off the Unisyllable, is the single universal language used in trade and diplomacy across the entire universe. It is a massively complex but simple-based language based on a system used by millions of other languages. It was created and published by Kuzon Jr., posthumously by his brother Kuzek, and adopted by Universal International in 1150.

Overview
There are 100 letters in the unisyllable, with 25 vowels. It is based on a hierarchy syntax system of pretenses and traditional grammar. It is widely used and adopted by billions of planets, to make official trade and diplomacy much easier and more efficient. It was drafted by KJ (as Supreme Justice of Earth) between 1135 and 1145, but unfinished when he died. His brother Kuzek continued writing it (using his notes as a guide) and published it in 1150, followed by its adoption by the new universal system, Universal International.