The Persian language is spoken not only in Iran. It is also spoken in Afghanistan and Tajikistan.

Persian used to be understood all over the Middle East and even in India.

Persian language variations are Tajik and Dari.

Related languages are Kurdish and Baluchi.

So there are three dialects of Persian. Farsi, Tajik and Dari.

Persian is written in Perso-Arabic. It is a form of Arabic script.