a suffix forming adjectival derivatives of place names, especially countries or cities; frequently used nominally to denote the inhabitants of the place or their language: Faroese; Japanese; Vietnamese; Viennese. By analogy with such language names, -ese occurs in coinages denoting in a disparaging, often facetious way a characteristic jargon, style, or accent: Brooklynese; bureaucratese; journalese; computerese.
Origin of -ese
probably orig. < Italian -ese, later representing Spanish, Portuguese -es, French -ais, -ois, all < Latin -ēnsem -ensis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
suffix forming adjectives, suffix forming nouns
indicating place of origin, language, or styleCantonese; Japanese; journalese
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
word-forming element from Old French -eis (Modern French -ois, -ais), from Vulgar Latin, from Latin -ensem, -ensis "belonging to" or "originating in."
Online Etymology Dictionary, © 2010 Douglas Harper