What is 'Happy New Year' when translated from English to Celtic languages?

Irish Gaelic: Athbhliain faoi mhaise dhuit! (dhaoibh, pl.)

Scottish Gaelic: Bliadha Mhath Ùr!

Manx Gaelic: Blein Vie Noa!

Welsh: Blwyddyn newydd dda i chi!

Breton: bloavezh mat!

Cornish: Blydhen Nowydh Da!

Learn How One can Wish/Greet Happy New Year in Different Language