The first textual evidence of the Greek language dates back to 15th century BC and the Linear B script which is associated with the Mycenaean Civilization. Greek was a widely spoken lingua franca in the Mediterranean world and beyond during Classical Antiquity, and would eventually become the official parlance of the Byzantine Empire.
During the 19th and 20th centuries there was a major dispute known as the Greek language question, on whether the official language of Greece should be the archaic Katharevousa, created in the 19th century and used as the state and scholarly language, or the Dimotiki, the form of the Greek language which evolved naturally from Byzantine Greek and was the language of the people. The dispute was finally resolved in 1976, when Dimotiki was made the only official variation of the Greek language, and Katharevousa fell to disuse.
Greece is today relatively homogeneous in linguistic terms, with a large majority of the native population using Greek as their first or only language. Among the Greek-speaking population, speakers of the distinctive Pontic dialect came to Greece from Asia Minor after the Greek genocide and constitute a sizable group. The Cappadocian dialect came to Greece due to the genocide as well, but is endangered and is barely spoken now. Indigenous Greek dialects include the archaic Greek spoken by the Sarakatsani, traditionally transhument mountain shepherds of Greek Macedonia and other parts of Northern Greece. The Tsakonian language, a distinct Greek language deriving from Doric Greek instead of Koine Greek, is still spoken in some villages in the southeastern Peloponnese.
The Muslim minority in Thrace, which amounts to approximately 0.95% of the total population, consists of speakers of Turkish, Bulgarian (Pomaks) and Romani. Romani is also spoken by Christian Roma in other parts of the country. Further minority languages have traditionally been spoken by regional population groups in various parts of the country. Their use has decreased radically in the course of the 20th century through assimilation with the Greek-speaking majority.
Today they are only maintained by the older generations and are on the verge of extinction. This goes for the Arvanites, an Albanian-speaking group mostly located in the rural areas around the capital Athens, and for the Aromanians and Moglenites, also known as Vlachs, whose language is closely related to Romanian and who used to live scattered across several areas of mountainous central Greece. Members of these groups ethnically identify as Greeks and are today all at least bilingual in Greek.
Near the northern Greek borders there are also some Slavic–speaking groups, locally known as Slavomacedonian-speaking, most of whose members identify ethnically as Greeks. It is estimated that after the population exchanges of 1923, Macedonia had 200,000 to 400,000 Slavic speakers. The Jewish community in Greece traditionally spoke Ladino (Judeo-Spanish), today maintained only by a few thousand speakers. Other notable minority languages include Armenian, Georgian, and the Greco-Turkic dialect spoken by the Urums, a community of Caucasus Greeks from the Tsalka region of central Georgia and ethnic Greeks from southeastern Ukraine who arrived in mainly Northern Greece as economic migrants in the 1990s.