Meridian — The Common Tongue
Nobody designed Meridian. It grew. Over two hundred years of trade across the Drift lanes, fragments of six languages fused into something that isn't native to anyone and belongs to everyone.
The name comes from the Arion word meridar — meaning roughly "the place where things meet." It was a joke at first; Arion traders called the pidgin they used at crossroads stations the "meridar tongue." By the time the Sovereignty tried to enforce its own standardized language — High Solaran — Meridian was already too embedded to displace. The Sovereignty still teaches High Solaran in its academies. Everyone learns Meridian in the streets.
It has irregular grammar, borrowed phonology from all six species, and no written standard — though three competing written forms exist and speakers of each claim the others are wrong. In practice, context does most of the grammatical work. Tone does the rest. Insults are, for historical reasons, borrowed primarily from Vrask.