'Nadolig Llawen' is how you say 'Merry Christmas' in Welsh
Nadolig Llawen
Nadolig Llawen
Nadolig Llawen a Blwyddyn Newydd Dda
Just as in your question !They tend to say "Happy Christmas" instead of "Merry".Merry Christmas
You say ' Merry Christmas' in the UK.
merry christmas
"Merry Christmas"
merry christmas
Merry christmas
Merry Christmas
merry Christmas= Christmas aashamsakal