In http://www.aifb.uni-karlsruhe.de/pipermail/swikig/2007-March/000357.html ,
user requested supporting English names for SMW namespaces.
You can use[[Category:Aktorki]] as well as [[Kategoria:Aktorki]] on a Polish
Mediawiki site, but for the SMW namespaces only [[Relacje::xx] works, you can't
I have a fix, which is to append the canonical English namespace names and codes
to $wgNamespaceAliases in SMW_GlobalFunctions.php, but I'm not sure how much
this buys us.
His other request is to allow canonical English names for built-in types like
Liczba zmiennoprzecinkowa (Integer), but that's separate and I think a lot more