From LSWiki

Class: Language Skills
Attribute: Intelligence
Pedagogy: Procedural
Language Difficulty: Typical
Language Speed: Slow
Language Overlaps:
  Kathdax: moderate

The ability to speak and comprehend Dethek, the language of the dwarves.
It is a sharp language with many hard consonants; some consider it an ugly tongue,
though others say it has a certain stark aesthetic appeal.

Trainers

Leah's Hill: Arvan the Keeper
Kolond: Morin
Jhan: Hardrad
Liathyr: Delia
Rukhan: Taga
Hank's Garbage Dwarves: Hank -- Will train non-trashmen
Association required:
Crafty Linguists: Janid Suzak Wanders
Guild required:
Quest required: