What is the weather like? What about languages?

What sort of weather should we expect?

New Zealand has a moderate climate, and all temperatures are shown in Celsius instead of Fahrenheit.  Being in the Southern Hemisphere of the world, our seasons are opposite to those in the Northern, so if you arrive in New Zealand in December, do not expect to have snow surrounding you, but rather think of enjoying long evenings on the beach. 
It is advisable to bring a waterproof jacket and clothing for all weather, as the weather can be changeable throughout the day. 

What languages are spoken in New Zealand?

New Zealand has two official languages, English and Te Reo Maori. If you don't speak Maori, don't worry, just stick to English and communication will be as easy as Do Re Mi.