Honest Michealr,
I wouldn't change a word.It's a really nice song
Most Scots and Irish bands will tackle a song from any continent and play it in their own style.
I think the original songwriter probably took some time to think of the expresions, Delta moon and Gulf winds.
Think of The Lakes of Potentrain(spelling?) as sung by many Irish performers.
You know, us celts have travelled quite a bit.