Phrygian language
The Phrygian language was the Indo-European language of the Phrygians, spoken in Asia Minor during Classical Antiquity (2nd millennium BC to 5th century AD).
Phrygian is considered by some to have been closely related to Greek. However, others, such as Eric P. Hamp, relate Phrygian with Italo-Celtic in a "Northwest Indo-European" group. The similarity of some Phrygian words to Greek ones was observed by Plato in his Cratylus (410a).
Inscriptions
Phrygian is attested by two corpora, one from around 800 BCE and later (Paleo-Phrygian), and then after a period of several centuries from around the beginning of the Common Era (Neo-Phrygian). The Paleo-Phrygian corpus is further divided (geographically) into inscriptions of Midas (city) (M, W), Gordion, Central (C), Bithynia (B), Pteria (P), Tyana (T), Daskyleion (Dask), Bayindir (Bay), and "various" (Dd, documents divers). The Mysian inscriptions seem to be in a separate dialect (in an alphabet with an additional letter, "Mysian-s").