For technical documentation with many foreign words, a glossary would be very handy. For example, info could be displayed when hovering over words.
Move a complete "tree" of pages
Although a wiki is a collection of pages, often they are organised in a tree structure. If you want to move a page that is at the top of a subtree and all pages below it, that is very cumbersome. Adding a "move tree" function would greatly simplify moving, or renaming, subtrees and keep consistency.
Spoiler in Visual Editor
Could you implement the spoiler-function (via Details/Summary) in Visual-Editor? If you set it HTML-Mode and convert the page to Editor it gets removed.
Page Approval Function
When a user created or edited a page, it wont publish right away, rather have a admin or higher lever user to approve the modification, then publish.
Export pages to pdf
Looking for a nice way to share (formatted) wiki pages with external links intact
Moving a page should update links
Currently when moving or renaming a page, all existing links point to the old page. The correct behaviour would be to update all links to the new page, either optional or explicit.
complete Backup export and import
Looking for a nice way to create a complete wiki backup which contains Users, Settings and Content. And a way to import it in the setup wizard after Installing the wiki
Send an email when a comment is added
When someone adds a comment to a page can an email be sent out?
Auto purge path from illegal characters
It would be very much easier for the end user that doesn't know anything about URL to just type in the page title that will then be automatically purged from undesired characters. Would also resolve some other issues about illegal characters once and for all.
Configurable markdown template page
As an administrator, I would like to help novice users not used to markdown create their first markdown page. It would be nice to be able to configure a custom default page with more inspiration than just Header/text. The default page is also currently in english only.