Jersey Dutch

Proper noun

 * 1) A lect or set of dialects, derived from Dutch, spoken in New Jersey from the late 17th century until the early 20th century, various dialects of which were more creolized (with English and Lenape) than others.

Usage notes
On Wiktionary, the code which represents the Jersey Dutch language is "gmw-jdt". One variety of Jersey Dutch was sometimes called "Negerduits" or "Negerhollands"; it should not be confused with the lect called "Negerhollands" that was spoken in the Caribbean and given the ISO code: "dcr".