The term Armenian is often used to to refer to one of three different languages, each of which has its own unique dialects. Armenian can be used to refer to Modern Eastern Armenian (which is the official language of the Republic of Armenia); to Modern Western Armenian (which developed in the regions of Armenia that are today located within Turkey and also serves as the variety spoken in the diaspora); and to Classical Armenian (which is the oldest form of the language). The Armenian language's closest living relative is Greek. Still, Armenian has borrowed many words from Indo-Iranian languages, particularly Persian. Eastern Armenian is used in Armenia as well as in enclaves found in Iran and Azerbaijan. Western Armenian is used by the Armenians of Istanbul, Egypt, Lebanon, and in other parts of the Armenian diaspora, as well as in eastern Turkey. There are about six million speakers of Armenian around the world today.