How do you spell happy birhday in maori?

There isn't a direct translation for "Happy Birthday" in Māori. However, you can express the sentiment by saying:

"Ngā mihi nui ki a koe i tō rā whānau!"

This translates to "Many greetings to you on your birthday!" It is a more formal and respectful way to wish someone a happy birthday.

You can also use a more informal greeting like:

"Tena koe i tō rā whānau!"

This translates to "Greetings to you on your birthday!" and is a more casual way to wish someone a happy birthday.

Ultimately, both options convey the sentiment of wishing someone a happy birthday in Māori.