I suggest this correction for file Wcmd_pol.lng in Polish language (this correction is more obvious for Polish people) and its in accordance with the rules of Polish grammar:
1519="%s / %s w %s / %s plik(ach/-ów)"
1522=", %s / %s katalog(-i/-ów)"
Correction polish lng file
Moderators: Hacker, petermad, Stefan2, white