Twi'leki/Legends

Twi'leki, Rylothean, or Ryl was the native spoken language of the Twi'leks.

Characteristics
Ryl incorporated subtle body language, including movement of the lekku, and so was difficult for non-Twi'leks to fully understand.

History
In addition to Ryl, Twi'leks were also fluent in Lekku language, a silent form of communication using gestures made purely with the lekku. Only Twi'leks could express themselves this way, and few other species could understand them readily. Lekku was ideal for private conversation between Twi'leks in crowded areas. Jedi Master Kit Fisto was one of the few non-Twi'leks to fully master Lekku.

Twi'leks were usually trilingual (in Ryl, Lekku and Basic) and biliterate (in Ryl and Basic - Lekku had no written form). Many Twi'leks also learned to speak Huttese.

As of the Jedi Civil War, an older form of the language, known simply as Twi'lek, was the dominant interstellar commerce language outside of the Republic. It was claimed to be nearly as widespread as Basic.

Notable non-native speakers of Ryl

 * 4-LOM
 * Passel Argente
 * Darsha Assant
 * Boushh
 * C-3PO
 * Clezo
 * Clyngunn
 * Darth Maul
 * Shada D'ukal
 * Durga the Hutt
 * Gardulla the Elder
 * Guri
 * San Hill
 * Jabba the Hutt
 * Graxol Kelvyyn
 * Obi-Wan Kenobi
 * Ki-Adi-Mundi
 * Ulaha Kore
 * Traest Kre'fey
 * Exar Kun
 * Jace Lorrin
 * Mazzic
 * Lorth Needa
 * Palpatine
 * Voss Parck
 * Cay Qel-Droma
 * Ulic Qel-Droma
 * Danni Quee
 * Revan
 * Miko Reglia
 * Profex Rynalla
 * Horox Ryyder
 * Sabé
 * Doel Scherp
 * Elan Sleazebaggano
 * Avaro Sookcool
 * Kam Solusar
 * Booster Terrik
 * Seeqov Thranx
 * Arajen Turmen
 * Finis Valorum
 * Quinlan Vos
 * Mace Windu
 * Xizor

Notable non-native speakers of Lekku

 * C-3PO
 * Kit Fisto (unconfirmed)
 * San Hill (only understands)

Behind the Scenes
In Living Force Campaign Guide, this language is misspelled Ryu.

Appearances

 * The Betrayal of Darth Revan
 * Star Wars: Knights of the Old Republic
 * Star Wars: Knights of the Old Republic II: The Sith Lords
 * The Clone Wars: Curfew
 * Star Wars Galaxies
 * X-wing: The Krytos Trap
 * X-wing: The Krytos Trap

Notes and references
Twi'leki Твилекский язык Twi'lekien kieli Twi'leki