. . .In fact, medical and legal vocabulary can easily be derived from Latin and Greek roots to this day.
Latin and Greek belong to the same family as Proto-Germanic, a family that developed from Proto-Indo-European
(PIE). This is the earliest language about which we have any knowledge from which European languages (and those of India) developed.
Although English owes its greatest lexical debt to Greek and Latin, it has borrowed generously from other languages as well: Scandinavian, Hindi, Yiddish, various East European languages and, of course, North American native languages.