Yes, Realtracks can be used with any key signature.

One thing to remember is that the style genre is not set in stone. In other words a jazz style can work in a country song and visa-versa. It can be fun to take say a ballad and use a Latin track for the background. I things like that all of the time.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware