Trigedasleng is a constructed language (conlang) developed by David J. Peterson for use on the CW show The 100. The Woods Clan (Trigedakru/Trikru) and Sand Nomads (Sanskavakru) have been heard using this language, but other groups of grounders (that is, earth-born people not born inside Mt. Weather) may also speak the language. Some of the Sky People (Skaikru; those from the Ark) began to learn Trigedasleng after repeated contact with the Trigedakru.
Trigedasleng is descended from a heavily-accented dialect of American English. It has evolved rapidly over three generations. Its development was also influenced by an early code-system that was developed shortly after the Cataclysm, but this only affected the lexicon in any substantial way. At the time of the Ark's descent, it is believed that most grounders speak only Trigedasleng; warriors (and certain others, like Nyko the healer) speak both Trigedasleng and American English, a fact which they are careful to hide from their enemies.
Trigedasleng is not a creole, but a descendant of American English alone, and while it may share similarities with AAVE (African American Vernacular English, which is also derived from American English), those similarities are not intentional, and Trigedasleng does not derive from AAVE.