Board Thread:Support Requests - Designing Your Wiki/@comment-5716479-20130613173152/@comment-452-20130614032151

I too wondered this a long time ago, and I've never come across a good centralised documentation page for commonly edited system messages, so I don't know if I'll be able to tell you anything you don't already know. When I asked, I seem to remember that the answer I was given was little more than "Go to Special:AllMessages", so hopefully I can do a little better than that.

In general, system messages as sometimes linked from relevant help pages, such as Help:Welcome Tool, which links to both of the pages you mentioned.

To see the names of most system messages in use on a page, you can add "?uselang=qqx" to the end of the URL (use &, if there's already a ?). But this doesn't work for welcome messages, or for the wiki navigation.

Special:AllMessages lists everything. Unfortunately, there's no really easy way to find what you're looking for.

When I'm looking for something specific, I just set "Items per page" to "5000" and use my browser search to look for a certain phrase.

If I know a certain wiki uses a custom message, I'll go to their Special:AllMessages, set "Filter by customisation state" to "modified" and search for the message.

Even if you're not looking for anything specific, but just want to see commonly changed messages for ideas, using that last method with a highly customised wiki is a good place to start.