New answers tagged mediawiki
If you're only interested in doing a regex search of Wikipedia titles, Crossword Nexus allows you to do that. http://crosswordnexus.com/wiki
As far as I know, MediaWiki's standard installation does its search on the page syntax. So you may simply combine your key word with the category definition in parantheses: keyword "[[Category:keycategory]]"
Top 50 recent answers are included