Intra-dialect relations in wider dialectal regions have hardly been studied. The main reason for this is the lack of a linguistic atlas, that is, the mapping of isoglosses in a way that would allow us to accurately monitor the direction of their spread as well as their extent. Macedonian-Epirote isoglosses can be divided into two basic groups: (i) those that have wider distribution in Epirus (first-person plural suffixes in the active past tense, special forms of palatalization, forms of
... nt assimilation, etc.) and smaller distribution in Macedonia, limited to the Macedonian dialects neighbouring on Epirus; these dialects can be considered as the tip of wider Epirote isoglosses, (ii) those that have wider distribution in a large part of the Northern dialects (evaluative morphemes, formation of comparatives, columnar stress in verbal forms, etc.) and play a significant role in the general division of this dialectal group. Given that Epirus is considered a relatively isolated region, it is necessary to examine the circumstances that led to the appearance of isoglosses (the product of direct language contact between neighbouring dialects, the end result of recent population movements or the remnants of older, broader isoglosses that split up due to historical reasons?).