The article deals with the adaptation of Belorussian and Russian affixes in Polish dialects of Braslaw region. The author singles out certain models of af fixal adaptation on the basis of phonetic, morphological and semantic or phonomorphological equivalence. Collected vocabulary provides many examples where we can observe the assimilation of foreign elements into the native system of the multilingual population. Modifications of borrowings in this way indicate the vitality of the systemic word-formative rules of the Polish language in the speakers’ consciousness.

The author of the article makes an attempt to show borrowings from the perspective of their penetration into Polish and presents the most common and less frequent words. Special attention is paid to the usage and context of separate words in pairs (native word ~ borrowed word) in two idiolects that demonstrate the preservation of the Polish language tradition and show a new wave of loanwords as well. The author describes some word-formative peculiarities of verbs in the dialectal Polish language of Gródek Podolski. This text can be a supplement to the previous papers concerning borrowed vocabulary and morphological derivation in Polish dialects.