I am interested to learn if the English translation you have quoted by John S Cottam is that of my late ex Father-in-law John S Cottam from Rumney in Cardiff. I recall him attending the local radio station in the late 1960's or early 70's with his two brothers (one named Tom the other I can't recall his name) and singing John's version without music. They were all members of Llandaff Rugy Club and used to sing many songs but this was John's particular favourite I believe.