Swedish (my older sister's husband's heritage): God Jul
Turkish (niece, her husband and great niece in Turkey): Noeliniz Ve Yeni Yiliniz Kutlu Olsun
Scots Gaelic (my father's family heritage): Nollaig Chridheil dhuibhv
Welsh (my mother's family heritage): Nadolig Llawen
I can pronounce God Jul, but that's about it. :) I hope you are having a wonderful holiday!