Not to mention that the English dictionary is stuffed with legacy words that no natives understand. Is it even part of the language if no native use it? It's another debate.
This is 100% incorrect as you’ve written it. The GRE is based on English vocabulary. It’s true that many words have Greek, Latin, or French roots but they are most certainly not Latin, Greek, or French.
But I think most of those words are in use somewhere, for something.