Board Thread:Support Requests - Community Management/@comment-36579093-20190527221315/@comment-5811199-20190528020228

You can have a look at Help:Interlanguage link - basically, you need to create a new wiki of the same name but different language (so like, wiki.fandom.com/es) - and then request an interwiki link between the two wikis.

Then, once the two wikis are linked, you'll be able to add interlanguage links between each page. This is done in source mode, where you add a  at the end of each page.