I would like to add the following lines to mediawiki-config file, for a better localisation of user categories on nap.wikipedia
'napwiki' => array( '0' => 'Utente %code%-0', '1' => 'Utente %code%-1', '2' => 'Utente %code%-2', '3' => 'Utente %code%-3', '4' => 'Utente %code%-4', '5' => 'Utente %code%-5', 'N' => 'Utente %code%-N', ),