Doric Greek was an Ancient Greek regional portion of a language.
 According to this hypothesis, Hatzopoulos concludes that the Macedonian Greek dialect of the historical period, which is attested in inscriptions, is a sort of koine resulting from the interaction and the influences of various elements, the most important of which are the North-Achaean substratum, the Northwest Greek idiom of the Argead Macedonians, and the Thracian and Phrygian adstrata
 The Northwest Doric koine was thus both a linguistic and a political rival of the Attic-Ionic koine

