EN
The object of the analysis is forms considered incorrect, non-standard, yet included and discussed in Enlightenment grammar books of Polish by: Walenty Szylarski (1770), Michał Dudziński (1776), and Onufry Kopczyński (1778–1781, 1817), and in a book on the Polish language by Stanisław Kleczewski (1767). The issues of proper language use touched upon by the authors in the abovementioned works refer to various problems: spelling, pronunciation, inflection, word structures and appropriateness, syntactic connectivity, and utterance/statement clarity. The object of the evaluation is (general Polish and regional – borderland) forms which, in the authors’ opinion, violated the norms of general familiarity, semantic expressiveness, and stylistic dignity. The grammarians approve of the borrowings which entered the Polish language long ago. Each of the discussed works is another link in the debate on the Polish language, linguistic habit, and norms of language use.