Board Thread:General Discussion/@comment-7369594-20190520145106/@comment-9605025-20190520151937

I am not sure about the searching stuff.

Wikis can request interlanguage linking to sites on the same topic but in different langauges. This is one why to find them. If interlanguage linking is enabled, there will be a dropdown in the upper right of the page above the edit dropdown.

Previously, non-English wikis could be hosted as subdomains of the English wiki. For example, "fr.fairytail.fandom.com/wiki" and "de.fairytail.fandom.com/wiki" instead of "fairytail.fandom.com/wiki". Wikia has changed this structure such that is it now "fairytail.fandom.com/fr/wiki" and "fairytail.fandom.com/de/wiki". Note that you can use "fairytail.fandom.com/en/wiki" but that will simply redirect you to "fairytail.fandom.com/wiki".

Regarding wikis that are not connected at all except by topic, I have no idea.

Not sure if any of that helps.