This article presents the situation caused by the interference of new lexical units foreign to a specific dialect. Words transparent with respect to word formation, like grabisko, siekierzysko, kosisko, stylisko, documenting the idiom of the formant -isko with the noun base (in names of the components of simple tools) change their characteristics under the influence of an increasingly popular form like styl ‘handle’. Consequently, the structure of the type kosisko ‘handle, hilt, grips of a scythe’ (with a noun basis) is being replaced by the type kosisko ‘the metal part of a scythe, the chine’ (with a verb basis). Similar transformations are taking place with grabisko.