Happy Holidays in Different Languages?

How do I say Happy Holidays in different languages? I have family in spain and also in china.
So I want to send an email but I'd like to say Happy Holidays in their language, they understand english but I want to say it in their language.
Can you explain me what is the correct way of saying happy holidays in different languages?

'Merry Christmas' are much more common outside of the U.S. than 'Happy Holidays', still here's how you say happy holidays in other languages:

Say Happy Holidays! In French: Joyeuses Fêtes!

Say Happy Holidays! In Spanish: Felices Fiestas!

Say Happy Holidays! In Swedish: Trevlig Helg!

Say Happy Holidays! In Portuguese: Boas Festas!

Say Happy Holidays! In Turkish: Mutlu Bayramlar!

Say Happy Holidays! In Romanian: Sarbatori Fericite!

Say Happy Holidays! In Mandarin: Jie Ri Yu Kuai

Say Happy Holidays! In Catalan: Bones Festes!

Say Happy Holidays! In Japanese: Tanoshii kurisumasu wo! (Have a happy Christmas)

Say Happy Holidays! In Italian: Buone Feste!

Say Happy Holidays! In South African (Xhose): Ii holide eximnandi

Say Happy Holidays! In German: Forhe Feiertage

Say Happy Holidays! In Dutch: Prettige feestdagen

Say Happy Holidays! In Hawaiian: Hau'oli Lanui (pronounced how-oh-lay la-new-ee)

Say Happy Holidays! In Gaelic: Beannachtaí na Féile

Say Happy Holidays! In Slovenian: Vesele Praznike

Say Happy Holidays! In Indonesian: Selamat Hari Raya!

Say Happy Holidays! In Croatian: Sretni praznici!