Posted on 17th June 2021 by melyn Isyeth is the Cornish word for slang Yes, slang in Cornish is isyeth Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Kenreydhek is the Cornish word for heterosexualNext post: Remova is the Cornish word for budge