diff --git a/src/wp-admin/includes/meta-boxes.php b/src/wp-admin/includes/meta-boxes.php
index cf7b2d59da..1d9b2834d0 100644
--- a/src/wp-admin/includes/meta-boxes.php
+++ b/src/wp-admin/includes/meta-boxes.php
@@ -496,7 +496,7 @@ function post_categories_meta_box( $post, $box ) {
 	<div id="taxonomy-<?php echo $tax_name; ?>" class="categorydiv">
 		<ul id="<?php echo $tax_name; ?>-tabs" class="category-tabs">
 			<li class="tabs"><a href="#<?php echo $tax_name; ?>-all"><?php echo $taxonomy->labels->all_items; ?></a></li>
-			<li class="hide-if-no-js"><a href="#<?php echo $tax_name; ?>-pop"><?php _e( 'Most Used' ); ?></a></li>
+			<li class="hide-if-no-js"><a href="#<?php echo $tax_name; ?>-pop"><?php echo esc_html( $taxonomy->labels->most_used ); ?></a></li>
 		</ul>
 
 		<div id="<?php echo $tax_name; ?>-pop" class="tabs-panel" style="display: none;">
diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index e557e81d46..eb07898507 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -452,6 +452,7 @@ function unregister_taxonomy( $taxonomy ) {
  * @since 3.0.0
  * @since 4.3.0 Added the `no_terms` label.
  * @since 4.4.0 Added the `items_list_navigation` and `items_list` labels.
+ * @since 4.9.0 Added the `most_used` label.
  *
  * @param WP_Taxonomy $tax Taxonomy object.
  * @return object {
@@ -486,6 +487,8 @@ function unregister_taxonomy( $taxonomy ) {
  *                                              list tables.
  *     @type string $items_list_navigation      Label for the table pagination hidden heading.
  *     @type string $items_list                 Label for the table hidden heading.
+ *     @type string $most_used                  Title used for the Most Used panel. Not used for non-hierarchical
+ *                                              taxonomies. Default 'Most Used'.
  * }
  */
 function get_taxonomy_labels( $tax ) {
@@ -517,6 +520,7 @@ function get_taxonomy_labels( $tax ) {
 		'no_terms' => array( __( 'No tags' ), __( 'No categories' ) ),
 		'items_list_navigation' => array( __( 'Tags list navigation' ), __( 'Categories list navigation' ) ),
 		'items_list' => array( __( 'Tags list' ), __( 'Categories list' ) ),
+		'most_used' => array( null, __( 'Most Used' ) ),
 	);
 	$nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];