Terran

Script: Unique

Summary: Sound travels fastest through solid objects, and as such, Terran is potentially the loudest of all the languages. Deep, booming rumbling travelling through the very mantle of the planet can be interpreted as speech to those trained in the subtle and complex art of Terran speech. 

Sounds: Terran is the sound of the earth rumbling, and of stone scraping against stone.

Appearance: Terran has no written language, but its knowledge can be stored in the form of magnetism. A rock charged with the energy of a Terran speaker can reveal hidden messages when held by another.