Using WordPress ‘load_muplugin_textdomain()’ PHP function

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The load_muplugin_textdomain() WordPress PHP function loads the translated strings for a plugin residing in the mu-plugins directory.

Usage

load_muplugin_textdomain($domain, $mu_plugin_rel_path);

Input:

  • $domain: ‘my-plugin’
  • $mu_plugin_rel_path: ‘my-plugin/lang’

Parameters

  • $domain (string): Text domain. Unique identifier for retrieving translated strings.
  • $mu_plugin_rel_path (string, optional): Relative to WPMU_PLUGIN_DIR directory in which the .mo file resides. Default: ”

More information

See WordPress Developer Resources: load_muplugin_textdomain

Examples

Loading textdomain for a custom plugin

function my_custom_plugin_load_textdomain() {
  load_muplugin_textdomain('my-custom-plugin', 'my-custom-plugin/lang');
}
add_action('plugins_loaded', 'my_custom_plugin_load_textdomain');

Loading textdomain for a multilingual plugin

function multilingual_plugin_load_textdomain() {
  load_muplugin_textdomain('multilingual-plugin', 'multilingual-plugin/languages');
}
add_action('plugins_loaded', 'multilingual_plugin_load_textdomain');

Loading textdomain with a subdirectory

function nested_plugin_load_textdomain() {
  load_muplugin_textdomain('nested-plugin', 'nested-plugin/subdir/languages');
}
add_action('plugins_loaded', 'nested_plugin_load_textdomain');

Loading textdomain without specifying a path

function default_path_plugin_load_textdomain() {
  load_muplugin_textdomain('default-path-plugin');
}
add_action('plugins_loaded', 'default_path_plugin_load_textdomain');

Loading textdomain with a custom action

function custom_action_plugin_load_textdomain() {
  load_muplugin_textdomain('custom-action-plugin', 'custom-action-plugin/languages');
}
add_action('custom_plugin_loaded', 'custom_action_plugin_load_textdomain');