Alert: This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness. Use get_translations_for_domain() instead.

_load_textdomain_just_in_time( string $domain )

Loads plugin and theme textdomains just-in-time.

Description Description

When a textdomain is encountered for the first time, we try to load the translation file from wp-content/languages, removing the need to call load_plugin_texdomain() or load_theme_texdomain().

See also See also

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Parameters Parameters


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

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Return Return

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

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Source Source

File: wp-includes/l10n.php

function _load_textdomain_just_in_time( $domain ) {
	global $l10n_unloaded;

	$l10n_unloaded = (array) $l10n_unloaded;

	// Short-circuit if domain is 'default' which is reserved for core.
	if ( 'default' === $domain || isset( $l10n_unloaded[ $domain ] ) ) {
		return false;

	$translation_path = _get_path_to_translation( $domain );
	if ( false === $translation_path ) {
		return false;

	return load_textdomain( $domain, $translation_path );

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Changelog Changelog

Version Description
4.6.0 Introduced.

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