Board Thread:Support Requests - Getting Technical/@comment-16919925-20141104220316/@comment-1038387-20141105211729

You don't have to worry about that. You can start creating pages now, or after it's done (now would be better). Then, after the wikis are linked, you can add Pagename and Pagename at the bottom (or Pagename, if you're doing it on one of the other wikis). The pagename should be the name on the wiki in question, like "de:Waffen", "en:Weapons" and "es:Armas".

It's general practice for interwiki links to be placed at the bottom of the source code (not vital, but less obtrusive), and (for organizational purposes) in alphabetical order.