MediaWiki extensions manual
OOjs UI icon advanced.svg
Release status: beta
Implementation User interface
Description Allows admins to add or replace default messages using a global variable
Author(s) Ike Hecht (tosfostalk)
Latest version 0.2 (March 2019)
MediaWiki 1.25+
PHP 5.3+
Database changes No
License GNU General Public License 2.0 or later
Translate the AddMessages extension if it is available at translatewiki.net
Check usage and version matrix.

The AddMessages extension allows admins to add or replace default messages using a global variable. This can be set in LocalSettings.php. Other extensions could potentially set this variable or implement similar code in order to add messages. This used to be possible with $wgMessageCache->addMessage() but that feature has been removed. This feature is particularly useful in wikifarms, where it may not be practical to add a particular message to every individual site.


  • Download and place the file(s) in a directory called AddMessages in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php:
    wfLoadExtension( 'AddMessages' );
    $wgAmMessages = array();
  •   Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.

Configuration parametersEdit

An array of message key and value pairs. Will take precedence over existing messages. Example:
$wgAmMessages = array( 'toolbox' => 'My Toolbox' );

See alsoEdit