I notice there are other languages of Nintendo Wiki that this one is connected to--at least German, Spanish, French, Portuguese, Japanese, and Chinese that I see. However, connections between individual pages seem a bit lacking. Random example, the Japanese wiki's page for Wizards & Warriors links to its English counterpart, but the English one doesn't link back.
I've added a few manually, but there are some much quicker ways to get a lot of them set up using bot programs. This is something I take care of at another family of wikis, so I could provide some more information on this if anyone's interested. It actually should be pretty easy for me to run through the same process for Nintendo Wiki, but it's usually considered kind of bad form to do such a thing that would be making hundreds of edits and flood Recent Wiki Activity with an account that's not set up as a bot at a given wiki.