Holy Moley! 10/10.
I have to admit that I made and educated guess (or shot in the dark, depending on how you look at it) with a couple of the questions.
4. A representation of the manger is usually placed in Irish homes, what is this called? Crib
6. You make a list (again), reminding yourself to get a Christmas candle. Why do Irish people put candles in their windows at this time? Hospitality.
Candles, in old times, were put in windows to guide wonders home -- Hospitality seemed like the only fitting choice.
9. A few workmates suggest as it's Christmas you might like to 'choraulien' with them, what are they suggesting? Carolling
Can't say anyones ever asked me to Choraulien before but the word looked a bit like 'chorus' so that seemed like Carolling to me.
I agree that I don't understand how you would know some of this stuff unless you were Irish.
"I have always thought of Christmas time, when it has come round, as a good time; a kind, forgiving, charitable time; the only time I know of, in the long calendar of the year, when men and women seem by one consent to open their shut-up hearts freely, and to think of people below them as if they really were fellow passengers to the grave, and not another race of creatures bound on other journeys." ~Charles Dickens