Well, I usually use the terminology stated in the instructions page:
Terminology:
"regions" are the total number of regions you occupy.
"zone bonus" are bonus troops you get for occupying all of the regions that make up a zone.
"spoils bonus" is the number of troops you get for turning in a group of spoils.
I often use territories as well, when referring to regions, and I tend to call to the spoils 'Cards'.
I don't like to use the word continents to refer the Zone bonus, as its not necessarily correct. That was a term directly connected to the classic board-game Risk where all 'Zone' bonus were indeed constituted by Continents.