:lang(pl) .theorem::before { content: 'Twierdzenie ' counter(theorem) '. ' !important; }
:lang(pl) .lemma::before { content: 'Lemat ' counter(theorem) '. ' !important; }
:lang(pl) .proof::before { content: 'Dowód. ' attr(title) !important; }
:lang(pl) .definition::before { content: 'Definicja ' counter(definition) '. ' !important; }