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

664	 * @since MU (3.0.0)665	 *666	 * @param string[] $output     Array of HTML output for the dropdown.667	 * @param string[] $lang_files Array of available language files.668	 * @param string   $current    The current language code.669	 */670	$output = apply_filters( 'mu_dropdown_languages', $output, $lang_files, $current );671 672	echo implode( "\n\t", $output );673}674 675/**676 * Displays an admin notice to upgrade all sites after a core upgrade.