mixture vs melange

mixture and melange both are nouns.

Word	Noun	Adjective	Verb	Adverb
mixture	Yes	No	No	No
melange	Yes	No	No	No

As nouns, melange is a hyponym of mixture; that is, melange is a word with a more specific, narrower meaning than mixture:

mixture (noun)	melange (noun)
the act of mixing together	a motley assortment of things
an event that combines things in a mixture
any foodstuff made by combining different ingredients
a collection containing a variety of sorts of things
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)