I think most of the typos are where vowels with fadas on them have been interpreted as different letters. For example é seems to have come out as an i. Its definitely Irish rather than Scottish, but it would be better to get a cleaner text if you're trying to learn to sing it.

Incidentally Mary's family are originally from Rathlin Island off the coast of County Antrim, which is pretty close to the Scottish coast, and from what I can gather some of the Gaelic spoken there is a hybrid of the two forms.