get_available_languages( string $dir = null ): string[]

1478function get_available_languages( $dir = null ) {1479	global $wp_textdomain_registry;1480 1481	$languages = array();1482 1483	$path       = is_null( $dir ) ? WP_LANG_DIR : $dir;1484	$lang_files = $wp_textdomain_registry->get_language_files_from_path( $path );1485 1486	if ( $lang_files ) {1487		foreach ( $lang_files as $lang_file ) {1488			$lang_file = basename( $lang_file, '.mo' );1489			$lang_file = basename( $lang_file, '.l10n.php' );1490 1491			if ( ! str_starts_with( $lang_file, 'continents-cities' ) && ! str_starts_with( $lang_file, 'ms-' ) &&1492				! str_starts_with( $lang_file, 'admin-' ) ) {1493				$languages[] = $lang_file;1494			}1495		}1496	}1497 1498	/**1499	 * Filters the list of available language codes.1500	 *1501	 * @since 4.7.01502	 *1503	 * @param string[] $languages An array of available language codes.1504	 * @param string   $dir       The directory where the language files were found.1505	 */1506	return apply_filters( 'get_available_languages', array_unique( $languages ), $dir );1507}