Posted on 8th August 2021 by melyn Diwyethek is the Cornish word for bilingual Yes, bilingual in Cornish is diwyethek Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Stifella is the Cornish word for sprayNext post: Limaval is the Cornish word for lime