I dont fully know why some people call it the FN2R.

The FN2 is the type R.
The FN is the 3 door civic hatchback chassis code and the number is for the engine.

FN1 is a 1.8
FN2 is the 2.0
FN3 is the 2.2 diesel which i wish austrralia got
FN4 is the 1.3