The Armenian language (classical: հայերէն; reformed: հայերեն [hɑjɛˈɾɛn] hayeren) is an Indo-European language spoken by Armenians. It is the official language of the Republic of Armenia and the self-proclaimed Nagorno-Karabakh Republic. It has historically been spoken throughout the Armenian Highlands and today is widely spoken in the Armenian diaspora. Armenian has its own unique script, the Armenian alphabet, restored in 405 CE by Mesrop Mashtots.
Linguists classify Armenian as an independent branch of the Indo-European language family. It is of interest to linguists for its distinctive phonological developments within the Indo-European languages. Armenian shares a number of major innovations with Greek, and some linguists group these two languages with Phrygian and the Indo-Iranian family into a higher-level subgroup of Indo-European, which is defined by such shared innovations as the augment. More recently, others have proposed a Balkan grouping including Greek, Phrygian, Armenian, and Albanian.