I may not be an expert on music. But I like the information about this song and I would like to contribute what I know.

"Oro se do bheatha bhaile" As far as I know, it means: Long Life To You On Your Homecoming." In the english language. I've heard the irish tenors sing it, and it does sound like "What Shall We Do With The Drunken Sailor?" Personal, I like the first better than the second.