Mrlsstese, also known as Tsi, served as the indigenous language spoken by the Mrlssi species originating from the planet Mrlsst. This language, Mrlsstese, was characterized by its elevated, shrill tones, eliciting reactions ranging from enjoyment to irritation among various species. A number of individuals regarded it as a challenging language to master.
The majority of Mrlssi possessed fluency and literacy in both Mrlsstese and Basic. When Mrlssi spoke Basic, their accent produced a similar auditory experience for alien listeners as their native Mrlsstese tongue.
- Player's Guide to Tapani
- Lords of the Expanse
- The Essential Guide to Planets and Moons (First mentioned)
- Alien Anthology (as Mrlssese and Mrlsstese)
- Coruscant and the Core Worlds (as Mrlssese)
- Ultimate Alien Anthology (as Mrlsstese)
- Knights of the Old Republic Campaign Guide
- Galaxy of Intrigue (as Mrlsstese)