Aegean language (Pacifica)
Aegean is an ancient language originally spoken in regions of the Rainbow Islands, and to this day its the official language spoken in UPRAN, over at Central Cordilia.
OOC
Aegean is the same language as real-life Greek. It was the official language in both Rhayna and Proktethia, but since Proktethia doesn't exist anymore, Rhayna is the only nation that speaks Aegean and isn't the origin of it.