Nolingual 

Refers to a person speaking no languages fluently. It can sometimes be referred as multilingual depending on the user.

A famous artist, Park Jaehyung of the Korean band Day6, is nolingual.

"Feel more nolingual these days"

Nolingual by standay6 September 18, 2019

Nullingual 

A person who cannot speak or write in the English language, but claims to know a language when they clearly know none.

'Should of'??? What a nullingual.

Nullingual by dumdums November 7, 2010

unolingual 

Spanglish; a person that speaks only English and does not plan to learn or even try to learn Spanish

In an annoyed tone, she replied to her colleague who always greeted her in Spanish "I don't speak Spanish, I am unolingual"

unolingual by tofallinlovewith October 4, 2013

colingualize 

Verb: To converse - especially with Eric Harvey

Why would we colingualize when we could be thinking of the game?

colingualize by Franz Kappus May 5, 2007