French "Joyeux Noel!"
Spanish "Feliz Navidad!"
Arabics "Eid Milad Majid (عيد ميلاد مجيد) Which means 'Glorious Birth Feast'"
Hawaiians "Mele Kalikimaka"
This year I've decided to learn how to say Merry Christmas in Italian "Buon Natali!!!"