The Armenian language (classical: հայերէն; reformed: հայերեն hayeren) is an Indo-European language spoken primarily by the Armenians. It is the official language of Armenia. Historically being spoken throughout the Armenian Highlands, today, Armenian is widely spoken throughout the Armenian diaspora. Armenian is written in its own writing system, the Armenian alphabet, introduced in 405 AD by Mesrop Mashtots.
Armenian is an independent branch of the Indo-European languages. It is of interest to linguists for its distinctive phonological developments within that family. Some linguists tentatively conclude that Armenian, Greek (Phrygian) and Indo-Iranian were dialectally close to each other; within this hypothetical dialect group, Proto-Armenian was situated between Proto-Greek and Proto-Indo-Iranian.
Armenia was a monolingual country by the 2nd century BC at the latest. Its language has a long literary history, with a 5th-century Bible translation as its oldest surviving text. Its vocabulary has historically been influenced by Western Middle Iranian languages, particularly Parthian, and to a lesser extent by Greek, Persian, and Syriac. There are two standardized modern literary forms, Eastern Armenian and Western Armenian, with which most contemporary dialects are mutually intelligible.