--- wp-langs.php	2012-07-23 10:20:35.000000000 +0100
+++ wp-langs-new.php	2012-07-23 10:13:44.000000000 +0100
@@ -545,6 +545,9 @@ function wp_mce_translation() {
 		'alt' => __('Alternate Text')
 	);
 
+	if ( ! class_exists( '_WP_Editors' ) )
+		require( ABSPATH . WPINC . '/class-wp-editor.php' );
+
 	$locale = _WP_Editors::$mce_locale;
 
 	$translated = 'tinyMCE.addI18n({' . $locale . ':' . json_encode( $default ) . "});\n";