I can only say Happy Christmas in two languages, French and English. French being "joyeux noel".
I can however say Happy New Year in Chinese. "Gung Hei Fat Choy".
When I was a little girl my Dad was in the Irish Guards and was stationed in Hong Kong for two years ( my sister was born in Kowloon on the Chinese mainland ). I would run around the house at Chinese New year yelling 'Gung Hei Fat Choy!!" over and over.
Or so my Mum tells me