From LSWiki

Class: Language Skills
Attribute: Intellect
Pedagogy: Procedural
Hidden Skill
Gestural Language
Hands Required: Two
Optimal Number of Hands: Four
Language Difficulty: Hard
Language Speed: Extremely Fast

The ability to use the K'telikix language, a form of gestural speech or sign
language used by the invae.  As one might expect, it is incredibly difficult
for races whose anatomies feature only two manipulatory limbs to use K'telikix.

Notes

Trainers

Association:
Crafty Linguists: Janid Suzak Wanders
Guild:
Quest: