macaronic vs plurilingual

macaronic

adj
  • Written in a hodgepodge mixture of two or more languages. 

noun
  • A work of macaronic character. 

  • A word consisting of a mix of words of two or more languages, one of which is Latin, or a non-Latin stem with a Latin ending. 

plurilingual

adj
  • of or pertaining to several languages 

How often have the words macaronic and plurilingual occurred in a corpus of books? (source: Google Ngram Viewer )