I have found some problems with this script.

1) Print footer ("This article is from Wikipedia (URL), the free online encyclopedia. You can find this article at URL") is in wikiPage.php and it should be in wikiText*.php That is it should be internationalizable.

2) The same word is used for names of languages and names of non-English Wikipedias. That's wrong for Polish because "language" is masculine but "Wikipedia" is feminine, so the word should be different ("polski" and "polska").

3) There are problems with interwiki links. If Polish article title contain non-ascii characters, I can't easily link it using [[pl:Name]]. The "right" solution is of course using UTF-8 for all wikipedias. We will have to do it some day, as not doing it is causing more problems than it saves. But that's not an urgent issue.