Trade languages were common languages used by merchants who did not speak a common tongue. Basic, the largest and most used language in modern galactic history, began as a trade language, but its status as a trade language during the period of the Galactic Republic was ambiguous. Chief among the modern trade languages was Bocce.
In the Outer Rim, Sy Bisti, Taarja, and Meese Caulf were used as trade languages. The Chiss used Sy Bisti and Minnisiat as trade languages. On Tatooine, Jawa Trade language was used, and the Squib had their own trade language.