Star Frontiers Revisited
All intelligent races in the known galaxy have a native language. In order to simplify interstallar trade, the Pan Galactic Corporation created Pan Gal, a language of sounds and gestures that can be spoken by almost any intelligent, speaking creature. It does not sound quite the same when spoken by members of different races, but anyone who speaks Pan Gal can understand a creature speaking Pan Gal. Because of its usefulness, Pan Gal is spoken on almost every world that has contact with the Pan Galactic Corporation or one of the Core Four races.