Iran before the revolution

One of the most important things to remember is that Iranians aren’t Arabs, they’re Persian. They speak Farsi (and other dialects), not Arabic, and some people might feel offended if you great them with Arabic words.Since the Arab invasion of Iran, Farsi has been written in Arabic letters with slight differences. While a lot of Arabic words have made it to the Persian dictionary, it doesn’t mean that an Arab can understand Farsi or the other way around.