People in New Zealand speak English and say "goodbye" as you do. If you mean how do you say goodbye in the Maori Language, then it is "Haere Ra".
well done/good job In Maori you say Ka Pai (pronounced 'Pie')
In New Zealand please is said please.
Kia ora (=~ 'wish you well' in Maori) would be a universally accepted alternate to good morning. Morena is also used, but that is probably just a derivation of Good Morning. (?)
New Zealand speaks English, so 'sweet' will be sweet in New Zealand. However, if you are asking 'how do you say sweet in Maori?', the answer is waiti.
Good Bye
Good bye you guys
Didn't Say Good Bye - 2000 was released on: USA: 25 March 2000 (Atlantic City Film Festival)
good bye or bye
Aurevoir. A bientôt. But if you say "good bye" or "bye bye" everyone understands you.
Haere ra
"Good-bye."
bye
I Say Good-bye was created on 2001-11-07.
La korn = Good bye or bye bye
Don't Say Good-Bye was created on 2009-06-24.
say bye bye
In Yiddish, you can say "tsayt a gezunt" to say goodbye, which means "stay healthy".
New Zealand is an English-speaking nation, so you would say "I'm home now."
Hello=Hola Good-bye=Adiós