When cursing in Gaelic, Mad Sweeney's character says:
"Why does the shit always happen to me? Have I not suffered enough? I am not bad! I am not!!!"
Mad Sweeney's description of change from king to his current status ends with "...General Mills did the rest." This is a reference to the manufacturer of Lucky Charms breakfast cereal which uses a leprechaun as their mascot
In the source novel, Essie McGowan is Essie Tregowan and she's Cornish rather than Irish.