I, John Doe, together with my parents, 'we' (po co to?) have the honor, to invite Mr X 'of' (nie rozumiem tego) (tu cos brak) the grand opening of 'restaurants' (a ile ich bedzie otwierane, wiecej jak jedna?) in 'the' (niepotr) street 'in such and such' (tego nie rozumime) Koszalin (tu brak 2 slowa) 25 April 2010 'year' (niepotr, samo 2010 daje Ci znak, ze to jest rok) at 'the time of' (niepotr) 17:00.
His presence also 'honoring us friends' (co?) , and some members of the family. (tu brak poczatku zdania) provided 'a' (z l. mnoga?) wonderful attractions, including fireworks.