Many linguists consider that Yuzzum language was the protolanguage for Ewokese; however, Yuzzum language did not evolve itself, so it coexisted with its own descendant, spoken by a different people. The protocol droid C-3PO spoke this language.
- Inside the Worlds of Star Wars Trilogy
- Endor and the Moddell Sector"—Star Wars Gamer 9 "
- The Official Star Wars Fact File 10 (END4, Forest Moon of Endor) (Indirect mention only)
- Geonosis and the Outer Rim Worlds
- Star Wars: Complete Locations
- Star Wars Character Encyclopedia