Also include local messages, i.e. messages that don't exist in the software but do exist as a MediaWiki: page.
This lists all MediaWiki: pages, so it will also list those that aren't really messages such as [[MediaWiki:Common.js|Common.js]].

Also include local messages, i.e. messages that don't exist in the software but do exist as in the {{ns:MediaWiki}} namespace.
This lists all {{ns:MediaWiki}}-namespace pages, so it will also list those that aren't really messages such as [[MediaWiki:Common.js|Common.js]].

{{doc-apihelp-param|query+allmessages|messages}}

For pages that already exist:

{{doc-apihelp-param|query+allmessages|includelocal}}

This is a category page.
It lists all of the pages in category "$1" as well as all subcategories of category "$1" if any exist.

This is a category page.
It lists all of the pages in category "$1" as well as all subcategories of category "$1" if any exist.

Customizations of site messages in MediaWiki namespace.

Lists all MediaWiki special pages

This messages says that there is an error and that the page cannot be deleted permanently.

Return messages in this language.

This page lists pages that use a particular page property.

Show all messages

Show all messages

The same as chat-type-your-message, but for private messages, shown in the input field for typing private messages

Name of category which users add pages to that will opt-it out of receiving messages.

Keeps the localised messages as up to date as possible