Hmm... I suppose as long as you use UESPWiki and credit them in the edit summary or on the page itself that would work. I say UESPWiki because I know our copyrights are the same and allow for sharing and stuff, but other copyrights might be a problem.
So basically check copyrights and other legal stuff, credit the people you got it from, do the normal stuff like that. One idea I had was someone can just put Lorem Ipsum text or just random words that are safe for work on pages. I'm about to import the wiki database to the test one, so we will have all the pages and accounts back soon.