The Ancient Macedonian language was the tongue of the Ancient Macedonians. It was spoken in Macedon during the 1st millennium BC. Marginalized from the 5th century BC, it was gradually replaced by the common Greek dialect of the Hellenistic Era. It was probably spoken predominantly in the inland regions away from the coast. It is as yet undetermined whether the language was a dialect of Greek, a sibling language to Greek, or an Indo-European language which is a close cousin to Greek and also related to Thracian and Phrygian languages.Knowledge of the language is very limited because there are no surviving texts that are indisputably written in the language, though a body of authentic Macedonian words has been assembled from ancient sources, mainly from coin inscriptions, and from the 5th century lexicon of Hesychius of Alexandria, amounting to about 150 words and 200 proper names. Most of these are confidently identifiable as Greek, but some of them are not easily reconciled with standard Greek phonology. The 6,000 surviving Macedonian inscriptions are in the Greek Attic dialect.The Pella curse tablet, a text written in a distinct Doric Greek idiom, found in 1986, dated to between mid to early 4th century BC, has been forwarded as an argument that the ancient Macedonian language was a dialect of North-Western Greek, part of the Doric dialects (O. Masson, 1996). Before the discovery it was proposed that the Macedonian dialect was an early form of Greek, spoken alongside Doric proper at that time (Rhomiopoulou, 1980).The classification of the language as "Greek" or not is of some importance in the context of the Macedonia naming dispute (see also Macedonian language naming dispute).