Sociolinguistics 7, Exercise 2: Michif

Why mixed, not creole: the source says a mixed language typically arises in a
population fluent in both source languages, whereas pidgins and creoles arise
where speakers of many languages acquire a common language. Michif keeps the
Cree parts "grammatically intact" and takes French nouns and determiners;
creoles often have simplified morphology, mixed languages often keep the
inflections of one or both parents.

Code-switching link: the page says a mixed language's fusion is fixed in
grammar and vocabulary, unlike code-switching, but that linguists think mixed
languages often evolve from persistent code-switching. (Bakker's account of
Michif, paraphrased on the page, is about children of European men and Cree,
Nakota and Ojibwe women learning a mix of French and Cree; I am not claiming
the page says Michif arose by code-switching.)

Source: Wikipedia, Mixed language.