Until 1948 even the zionists called it “Eretz Yisrael”. Under the British the official Hebrew name for the country was פלסטין– א״י, and the א״י stood for ארץ ישראל, though many zionists complained that the name פלסטין was a statement that the land is not Jewish., and the א״י really stood for אינה יהודית. Only when they declared the state did they change the name, and they did it to reject the traditions that went with the traditional name.
So when speaking English English I say “Israel”, but when speaking Jewish English, let alone Yiddish or Hebrew, I say Eretz Yisroel.