Mando'a, short for "Mando joha" or "Mandalorian language", is the language of the Mandalorians. The Mando'a dictionary and grammar guide can be found here.
A sample of Mando'a reading: "Kyr'amu ori'adate akay val kyrayc, bal kyr'amu ori'adate tug'yc." which roughly translates to "Kill them till they're dead, and then kill them some more."