Please have a look at the namespacealiases from "nds": http://nds.wikipedia.org/w/api.php?action=query&meta=siteinfo&siprop=namespaces|namespacealiases

There is a duplicate between namespaces and namespacealiases maybe caused by the fallback.
(id 6/14)

It is possible to filter out the duplicates? Thanks.

Version: unspecified
Severity: enhancement
URL: http://nds.wikipedia.org/w/api.php?action=query&meta=siteinfo&siprop=namespaces|namespacealiases