Over on Quora, which ironically is a Q&A site that properly executed the social answers concept far better than "Wikianswers", Jimmy Wales has titled himself as:
Wikipedia founder and Wikia cofounder
It's therefore clear that he knows what a "cofounder" is, and that he's capable of typing the word. But, he insists on insulting Larry Sanger and calling himself "Wikipedia founder". What a c**t.