The Phrygian epigraphical material is divided into two distinct subcorpora, Old Phrygian and New Phrygian. These attest different stages of the Phrygian language; are written with different alphabets and upon different materials; and have different geographical distributions.
The grammatical structure of Phrygian, what can be recovered of it, was typically Indo-European. Declensions and verbal conjugations are strikingly similar to ancient Greek.
The declension of adjectival nouns is entirely similar to that of substantives.
Phrygian is attested fragmentarily, known only from a comparatively small corpus of inscriptions. A few hundred Phrygian words are attested; however, the meaning and etymologies of many of these remain unknown.