What are "Creole" languages? And is that a valid linguistic category? Michel DeGraff of M.I.T., who leads the MIT-Haiti Initiative that creates STEM and STEAM materials for his mother tongue, Haitian Creole, helps us understand. For the full transcript, visit https://medium.com/wikitongues/what-are-creole-languages-anyway-michel-degraff-feb978b9e.