In Irish Gaelic, "Merry Christmas" is said as "Nollaig Shona Duit". "Nollaig" is the word for Christmas and "Shona" means "joy" or "happiness". "Duit" is a pronoun that means "to you". So "Nollaig Shona Duit" is a warm and friendly way to wish someone a happy and joyful Christmas.