diff --git a/src/wp-includes/js/tinymce/plugins/wplink/plugin.js b/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
index 690c3ea626..f2a9432ab8 100644
--- a/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
+++ b/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
@@ -365,6 +365,18 @@
 						minLength: 2,
 						position: {
 							my: 'left top+2'
+						},
+						messages: {
+							noResults: ( typeof window.uiAutocompleteL10n !== 'undefined' ) ? window.uiAutocompleteL10n.noResults : '',
+							results: function( number ) {
+								if ( typeof window.uiAutocompleteL10n !== 'undefined' ) {
+									if ( number > 1 ) {
+										return window.uiAutocompleteL10n.manyResults.replace( '%d', number );
+									}
+
+									return window.uiAutocompleteL10n.oneResult;
+								}
+							}
 						}
 					} ).autocomplete( 'instance' )._renderItem = function( ul, item ) {
 						return $( '<li role="option" id="mce-wp-autocomplete-' + item.ID + '">' )
diff --git a/src/wp-includes/js/wplink.js b/src/wp-includes/js/wplink.js
index 8cef9544c5..d541f26086 100644
--- a/src/wp-includes/js/wplink.js
+++ b/src/wp-includes/js/wplink.js
@@ -95,6 +95,18 @@ var wpLink;
 				minLength: 2,
 				position: {
 					my: 'left top+2'
+				},
+				messages: {
+					noResults: ( typeof window.uiAutocompleteL10n !== 'undefined' ) ? window.uiAutocompleteL10n.noResults : '',
+					results: function( number ) {
+						if ( typeof window.uiAutocompleteL10n !== 'undefined' ) {
+							if ( number > 1 ) {
+								return window.uiAutocompleteL10n.manyResults.replace( '%d', number );
+							}
+
+							return window.uiAutocompleteL10n.oneResult;
+						}
+					}
 				}
 			} ).autocomplete( 'instance' )._renderItem = function( ul, item ) {
 				return $( '<li role="option" id="mce-wp-autocomplete-' + item.ID + '">' )
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 1461e0d292..db74f09782 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -224,6 +224,14 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->add( 'jquery-ui-tooltip', "/wp-includes/js/jquery/ui/tooltip$dev_suffix.js", array( 'jquery-ui-core', 'jquery-ui-widget', 'jquery-ui-position' ), '1.11.4', 1 );
 	$scripts->add( 'jquery-ui-widget', "/wp-includes/js/jquery/ui/widget$dev_suffix.js", array('jquery'), '1.11.4', 1 );
 
+	// Strings for 'jquery-ui-autocomplete' live region messages
+	did_action( 'init' ) && $scripts->localize( 'jquery-ui-autocomplete', 'uiAutocompleteL10n', array(
+			'noResults' => __( 'No search results.' ),
+			/* translators: Number of results found when using jQuery UI Autocomplete */
+			'oneResult' => __( '1 result found. Use up and down arrow keys to navigate.' ),
+			'manyResults' => __( '%d results found. Use up and down arrow keys to navigate.' ),
+	) );
+
 	// deprecated, not used in core, most functionality is included in jQuery 1.3
 	$scripts->add( 'jquery-form', "/wp-includes/js/jquery/jquery.form$suffix.js", array('jquery'), '3.37.0', 1 );