Summery Summery

Load the translated strings for a plugin residing in the mu-plugins directory.

Syntax Syntax

load_muplugin_textdomain( string $domain, string $mu_plugin_rel_path = '' )

Parameters Parameters


(string) (Required) Text domain. Unique identifier for retrieving translated strings.


(string) (Optional) Relative to WPMU_PLUGIN_DIR directory in which the .mo file resides.

Default value: ''

Return Return

(bool) True when textdomain is successfully loaded, false otherwise.

Source Source

File: wp-includes/l10n.php

		return $return;

	if ( is_admin() || wp_installing() || ( defined( 'WP_REPAIRING' ) && WP_REPAIRING ) ) {
		load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo" );

	if ( is_network_admin() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) {
		load_textdomain( 'default', WP_LANG_DIR . "/admin-network-$locale.mo" );

	return $return;



Changelog Changelog

Version Description
4.6.0 The function now tries to load the .mo file from the languages directory first.
3.0.0 Introduced.


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