Goblin Language
Perhaps because of their history as traders and negotiators, goblinkind are sticklers for precise language. The goblin language has thirteen levels of adjective.
Humans with little experience speaking to goblinkind are often confused when interactions go badly and often bungle trade discussions with imprecise phrasing.
One aspect of goblinkind's language obsession that causes human travelers no end of consternation is the myriad of ways goblins perfer to be identified.
For example, the singular "goblin" is acceptable only when discussing someone's race - "I am a goblin", "he is a goblin" - but using it as a description would be to imply the speaker and the goblin are not equals - "that goblin over there" is highly offensive. Adding "goblin" to a title, such as referring to someone as "a goblin shipbuilder", is on the line of being offensive.