What is Merry Christmas in Irish Gaelic?
In truth, it depends who you're talking to:
Nollaig Shona Dhuit = Merry Christmas (one person)
Nollaig Shona Dhaoibh = Merry Christmas (multiple people)
By multiple, I mean two or more.
Athbhliain faoi Mhaise Dhuit = Happy New Year
Nollaig Shona Dhuit agus Athbhliain faoi Mhaise Dhuit = Merry Christmas and a happy new year. (Swop Dhuit for Dhaoibh if you're saying it to more than one person.)
How do you pronounce Merry Christmas in Irish Gaelic?
No-lig ho-nah witch = Merry Christmas (singular)
That last word has a kind of 'h' sound at the beginning of it, like a soft hwich. I've searched the internet for inspiration and found everything from 'ghwich' through to 'ditch' trying to cover it. There are further complications in that there are different accents depending on where you are in Ireland!
As a case in point, my pronunciation above was more Connaught; a friend from Cork just phonetically rendered it as: no-lag ho-na dit
No-lig ho-nah jeev = Merry Christmas (plural)
Av-leen foee Vah-sha-dut = Happy New Year.
You can hear these phrases and more spoken at Irish Gaelic Translator.com.