The Sibylline Prophecies were a miscellaneous collection of Jewish and Christian portents of future disasters and were accumulated among Christians of Late Antiquity http://www.sacred-texts.com/cla/sib/sib05.htm {mospagebreak} {p. 64} And the race of the Lydians rich in gold. And then shall Hellenes, proud and impure, Then shall a Macedonian nation rule, 210 Great, shrewd, who as a fearful cloud of war Shall come to mortals. ...

Linguistically, there is no real distinction between a dialect and a language without a specific factor. People usually consider the political factor to determine whether a certain kind of speech is a language or a dialect. Since the Pan-Hellenic area consisted of many small city- states (Attica, Lacedaemon, Corinth, etc.), and larger states (Molossia, Thesprotia, ...