To my shame I can't manage the Cornish. The Welsh, I think, would be: Mae Duw cariad.

Like Ellis, I am not a Welsh speaker. Some 50 years ago a fellow student decided that he would teach me Welsh. We had little time available, so we didn't get far. Latin and French were on our formal curriculum, but after all these years I think I remember more of the Welsh than of either of the others.
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There never was nothing.