As I understand it, only the Paschal Greeting is universal.
The Slavs have developed the numerous other ones (I was once approached in seminary by a fellow seminarian's wife who was a walking dictionary of all these sorts of things, and when she greeted me with "Christ is Circumcized!" I responded with "ouch" not knowing what to say in the face of her enthusiasm. She was a bit disappointed with me I'm afraid).
The Greeks tend more towards "Kalo ___________" for the various feasts and church-related events, or at least that's what our local hellenophile tells me. When approached, I generally smile and nod and prepare for a brief Greek language lesson, during which I slip into a fond memory of a Greek beach and utterly lose out on important knowledge.
Frankly, I could care less about such conventions, mostly because keeping or not keeping them is less important than being kind. Sometimes these kinds of things tend to make others feel rather alienated when they don't know how to respond. I do know a priest who like to show off at Pascha with Paschal Greetings in languages that those he greets are certain to have no knowledge of. In my heart, my general response is not fit to print, but I usually do not respond because he is not greeting me... but himself.