Thread:Nexus0.10/@comment-24169018-20140313113828/@comment-24169018-20140510162734

You start by creating a new page called Category:French, then go to any other similar category (such as Category:Korean), copy the source text (just in case), paste it on the new page (also through source mode) then changing the word Korean to French in the text. Then add Category:French to the categories Languages and Fangames. And you're done!