This is an Irish Gaelic version of Frère Jacques that's about Halloween. The song mentions Barmbrack, which is an Irish yeast bread that's served for the holiday. It's often cooked with a toy ring in it and the person who gets the ring is supposed to be the one who will get married within the year.
Oíche Shamhna, Oíche Shamhna,
Báirín, breac, báirín breac,
Úlla is cnónna, úlla is cnónna,
Is maith liom iad, is maith liom iad.
Apples and nuts, apples and nuts,
I like them, I like them.