Arrian, Plutarch and Herodotus all saw Macedonian as a distinctivly non-greek entity. Find me historians who are greater experts on ancient greek history.
That's basically all the proof that's needed.
There is no proof that the Macedonian's language is greek. There is not enough of it surviving to make that detirmination. However there is evidence that greeks needed translators to give orders to macedonians during battle.








