Posted on 26th October 20178th January 2017 by melyn Kwackya is the Cornish word for quack Yes, quack in Cornish is kwackya Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: ‘On the island’ in Cornish is ‘War an ynys’Next post: Nos is the Cornish word for night