mixed language
/ˌmɪks(t) ˈlaŋɡwɪdʒ/Now chiefly Linguistics
noun
A language made up of a mixture of elements from two or more languages; specifically (a) one which has been substantially influenced by another language (as English by Norman French) (now in non-technical use); (b) one which arises under conditions of contact between speakers of two or more languages, including pidgins and Creoles; a contact language.
Origin
Late 16th century. From mixed + language.