AHC: A Spanish New Zealand and Australia

Your challenge, (with no POD no earlier than 1750), should you choose to accept it, is to have the majority of Europeans in New Zealand and Australia, of Spanish descent, and for the later colonies to be more Latin in culture. Bonus points for a new Spanish names for both countries. Go!
 
By 1750 Spain and Portugal were spent forces in world exploration.

I could realistically see the Portugese making a go of exploring Australia and New Zealand in 1590's with ships blown southward from New Guinea.

Australia would have to offer something however as both Spain and Portugual were in for the quick buck first, not the long haul.
 
It might be of interest that the old ahtg.net had a travel guide of a *New Zealand called Nova Lusitania. Of course, with that name, it was Portugese speaking, in fact a full province of Portugal. It all started when Portugese missionaries landed in 1784. It was a brief guide, and didn't say *why* they landed.
 
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