The real origins of this song are as follows:
As sung: " Ba lero,lero, lillibulero,
            Lillibolero, bullen a la"

This is the phonetics of the Gaelic:

          "Ba leir e, ba leir e, an Lile ba leir e,
          An Lile ba leir e bua an la"

Translation :"It caused it, it caused it,"twas the Lily that cause it
             It was the Lily that caused the victory of the day"

Sounds more fluid in the original, doesn't it?