Index: wp-includes/script-loader.php
===================================================================
--- wp-includes/script-loader.php	(revision 24532)
+++ wp-includes/script-loader.php	(working copy)
@@ -281,6 +281,27 @@
 	$scripts->add( 'imgareaselect', "/wp-includes/js/imgareaselect/jquery.imgareaselect$suffix.js", array('jquery'), '0.9.8', 1 );
 
 	$scripts->add( 'mediaelement', "/wp-includes/js/mediaelement/mediaelement-and-player.js", array('jquery'), '2.12.0', 1 );
+	did_action( 'init' ) && $scripts->localize( 'mediaelement', 'mejs', array(
+		'locale' => array(
+			'language' => get_bloginfo( 'language' ),
+			'strings'  => array(
+				'Close'               => __( 'Close' ),
+				'Fullscreen'          => __( 'Fullscreen' ),
+				'Download File'       => __( 'Download File' ),
+				'Download Video'      => __( 'Download Video' ),
+				'Play/Pause'          => __( 'Play/Pause' ),
+				'Mute Toggle'         => __( 'Mute Toggle' ),
+				'None'                => __( 'None' ),
+				'Turn off Fullscreen' => __( 'Turn off Fullscreen' ),
+				'Go Fullscreen'       => __( 'Go Fullscreen' ),
+				'Unmute'              => __( 'Unmute' ),
+				'Mute'                => __( 'Mute' ),
+				'Captions/Subtitles'  => __( 'Captions/Subtitles' )
+			)
+		)
+	) );
+
+
 	$scripts->add( 'wp-mediaelement', "/wp-includes/js/mediaelement/wp-mediaelement.js", array('mediaelement'), false, 1 );
 
 	$scripts->add( 'password-strength-meter', "/wp-admin/js/password-strength-meter$suffix.js", array('jquery'), false, 1 );