The Métis language is called Michif (also Mitchif, Mechif, Michif-Cree, Métif, Métchif, French Cree). Michif is blend of Cree and French; the verbs are taken from Cree, while the nouns are taken from French.
For information on Michif, check out A Language of Our Own [e-book] by Peter Bakker (1997).
Online Michif Resources
Michif Language Series (Louis Riel Institute).