Bulgarian dialects in the context of "Proto-Slavic language"

The Slavic dialects of Greece are the Eastern South Slavic dialects of Macedonian and Bulgarian spoken by minority groups in the regions of Macedonia and Thrace in northern Greece. Usually, dialects in Thrace are classified as Bulgarian, while the dialects in Macedonia are classified as Macedonian, with the exception of some eastern dialects which can also be classified as Bulgarian. Before World War II, most linguists considered all of these dialects to be Bulgarian dialects. However, other linguists opposed this view and considered Macedonian dialects as comprising an independent language distinct from both Bulgarian and Serbo-Croatian.

The Kostur dialect (Macedonian: Костурски дијалект, Kosturski dijalekt) is a member of the Southwestern subgroup of the Southeastern group of dialects of the Macedonian language. This dialect is mainly spoken in and around the town of Kastoria, known locally in Macedonian as Kostur, and in the surrounding Korešta region, (Macedonian: Корешта; in the Kostur dialect: Korèshcha/Корèшча) which encompasses most of the area to the northwest of the town. The Kostur dialect is also partially spoken in Albania, most notably in Bilisht and the village of Vërnik (Vrabnik). The dialect is partially preserved among the ″people of Bulgarian origin in Mustafapaşa and Cemilköy, Turkey, descending from the village of Agios Antonios (Zhèrveni) in Kostur region (Aegean Macedonia)″.

The Kostur dialect shares strong similarities with the Nestram-Kostenar dialect and the Korča dialect. Bulgarian linguist Stoyko Stoykov regarded the Nestram dialect as a subgroup of the Kostur dialect, part of Bulgarian dialects. Other Bulgarian linguists also regard the dialect as a Bulgarian dialect.

The Transitional Bulgarian dialects are a group of Bulgarian dialects, whose speakers are located west of the yat boundary and are part of the Western Bulgarian dialects. As they have most of the typical characteristics of the North-Western Bulgarian dialects, they are sometimes classified as belonging to this subgroup under the name of Extreme North-Western dialects. On Bulgarian territory, the Transitional dialects occupy a narrow strip of land along the Bulgarian border with Serbia, including the regions of Tran, Breznik, Godech, Chiprovtsi and Belogradchik. They also cross the border to include the dialects or subdialects of the Bulgarian minority in the Western Outlands (the regions of Tsaribrod and Bosilegrad). The Transitional dialects are part of the Torlak dialectal group also spoken in southeastern Serbia and North Macedonia and are part of the gradual transition from Bulgarian to Serbian. The Bulgarian Transitional dialects and the Serbian Prizren-Timok dialects are loosely characterised by mixed, predominantly Serbian phonology and predominantly Bulgarian morphology. The features described here are characteristic only of the Transitional dialects within Bulgaria.

The Nestram-Kostenar dialect (Macedonian: Нестрамско-Костенарски дијалект, Nestramsko-Kostenarski dijalekt) is a Macedonian Slavic dialect spoken in parts of northwestern Greece, in the area around the village of Nestorio (Nestram) and the area known as Kostenarija, which encompasses most of the Nestorio municipality as well as in the Akrites region. There are also speakers in the adjacent Devoll District of Albania.

The Nestram-Kostenar dialect shares strong similarities with the adjacent Kostur (Kastoria) and Korča/Gorica (Korçë) areas. Vidoeski (1991) classifies these dialects as members of a south-western subgroup of the southern group of Macedonian dialects. Stoykov (1962) in his work on Bulgarian dialectology describes them as subgroups of the Kostur dialect.

The Ser-Drama-Lagadin-Nevrokop dialect is a dialect currently treated both in the contexts of the southeastern group of Bulgarian dialects and the southeastern subgroup of dialects of the Macedonian.Prior to the codification of standard Macedonian in 1945, the dialects of Macedonia were classified as Bulgarian.The dialect is dynamic and is well known for the shortening of the words, and also characterised by the excessive use of /ʲa/ for the Proto-Slavic yat even in cases where standard Bulgarian has /ɛ/, a feature which is typical for a number of dialects spoken in southern and southwestern Bulgaria (e.g. the Thracian dialect).The Ser-Drama-Lagadin-Nevrokop dialect is closely related to the neighbouring dialects. It is closer to all Eastern Bulgarian dialects than to all Western. Macedonian shares much less features with the dialect than it does with the Maleševo-Pirin dialect of Macedonian and Bulgarian. Some Bulgarian dialects are more similar to Macedonian than the Ser-Nevrokop dialect, the Samokov dialect shares more features with Macedonian than both the Ser-Nevrokop and the Pirin-Malasevo dialects do, even though it is not considered a Macedonian dialect, most of the western Bulgarian dialects and the Smolyan dialect share more similarities with Macedonian than the Ser dialect does. The Samokov dialect, most remarkably, shares with Macedonian and the Maleševo-Pirin dialect—the "to be" verb for future tense—"ke", which in contrast is "shte" in the Ser-Nevrokop dialect and in the Bulgarian language. The Yat border passes through the Maleševo-Pirin dialect and divides it on such a way that in the northern area of the dialect the yat is pronounced "e" (as in all the Western Bulgarian dialects and Macedonian) and in the south—"ya" (as in the Eastern Bulgarian dialects and standard Bulgarian). In the Ser-Nevrokop dialect the yat is pronounced in most places "ya", therefore the city of Serres, after which the dialect is named, is called "Syar" by the locals, as opposed to "Ser" in Macedonian. The first person singular is as in Bulgarian, ending with "a" or "am" as opposed to the constant "am" in Macedonian and the Bulgarian Smolyan dialect. The words for man -"m'zh" and for a dream "s'n" are as in Bulgarian, unlike the Macedonian "mazh" and "son". The words for night and tear—"nosht" and "s'lza" are as the Bulgarian, unlike the Macedonian "nok" and "solza".

The Serres-Nevrokop dialect is treated both in the contexts of Bulgarian and Macedonian dialectology. As described in the section about its range, the vast majority of its speakers identify as Bulgarians. In the context of Bulgarian dialectology, the dialect is situated East of the Yat boundary and thus is considered to belong to the Eastern Bulgarian dialects, more exactly to the Rup subgroup