apply_filters( 'mu_dropdown_languages', string[] $output, string[] $lang_files, string $current )

660	 * @since MU (3.0.0)661	 *662	 * @param string[] $output     Array of HTML output for the dropdown.663	 * @param string[] $lang_files Array of available language files.664	 * @param string   $current    The current language code.665	 */666	$output = apply_filters( 'mu_dropdown_languages', $output, $lang_files, $current );667 668	echo implode( "\n\t", $output );669}670 671/**672 * Displays an admin notice to upgrade all sites after a core upgrade.