"Santa Maria! Ayak gibberish" is what it sounds like to me. Of course, considering that he has no jaw, tongue or lips, it can be a bit difficult to understand what he's saying. Maybe it's actually "Get off my island, ya scurby landlubbers!"
The leprechaun, from what I hear, says something along the lines of "so you want my gold? there's some people who's the problem." (beats "They're after me lucky charms!")
It's the lost language of Spiralese from an extinct world that was known as Piratia. Deciphered rubbings suggest that he is saying, "They won't let me have a Wraith pet and I can't take it any more."
