It definitely can display non-english characters like German Umlauts or Scandinavian special chars. As far as I know even Arabic and Hebrew chars are displayed properly. But it definitely is possible that some country specific chars are not supported by the used fonts.The default skin doesn't seem to support non-english characters?
I can open the site, but clicking on the link is not downloading anything here.One of the files can be downloaded from here:
http://www.pexis.nl/pub/mp2bugs/
Here also in the meantime...download works here.