diff --git a/core/modules/comment/src/Entity/Comment.php b/core/modules/comment/src/Entity/Comment.php
index 909abc3..930dc57 100644
--- a/core/modules/comment/src/Entity/Comment.php
+++ b/core/modules/comment/src/Entity/Comment.php
@@ -333,6 +333,7 @@ public static function bundleFieldDefinitions(EntityTypeInterface $entity_type,
    * {@inheritdoc}
    */
   public function hasParentComment() {
+    // Do not load parent comment entity.
     return (bool) $this->get('pid')->target_id;
   }
 
diff --git a/core/modules/comment/templates/comment.html.twig b/core/modules/comment/templates/comment.html.twig
index 75604b9..37dd72f 100644
--- a/core/modules/comment/templates/comment.html.twig
+++ b/core/modules/comment/templates/comment.html.twig
@@ -45,21 +45,16 @@
  *
  * These variables are provided to give context about the parent comment (if
  * any):
- * - comment_parent: Full parent comment entity (if any).
+ * - parent_comment: Full parent comment entity (if any).
  * - parent_author: Equivalent to author for the parent comment.
  * - parent_created: Equivalent to created for the parent comment.
  * - parent_changed: Equivalent to changed for the parent comment.
  * - parent_title: Equivalent to title for the parent comment.
  * - parent_permalink: Equivalent to permalink for the parent comment.
- * - parent: A text string of parent comment submission information created from
- *   'parent_author' and 'parent_created' during template_preprocess_comment().
- *   This information is presented to help screen readers follow lengthy
- *   discussion threads. You can hide this from sighted users using the class
- *   visually-hidden.
  *
  * These two variables are provided for context:
  * - comment: Full comment object.
- * - entity: Entity the comments are attached to.
+ * - commented_entity: Entity the comments are attached to.
  *
  * @see template_preprocess_comment()
  *
@@ -93,9 +88,14 @@
       Indicate the semantic relationship between parent and child comments
       for accessibility. The list is difficult to navigate in a screen
       reader without this information.
+      This information is presented to help screen readers follow lengthy
+      discussion threads. You can hide this from sighted users using the class
+      visually-hidden.
     #}
-    {% if parent %}
-      <p class="visually-hidden">{{ parent }}</p>
+    {% if parent_comment %}
+      <p class="parent visually-hidden">{{ 'In reply to !parent_title by
+      !parent_author'|t({ '!parent_title': parent_title, '!parent_author':
+      parent_author }) }}</p>
     {% endif %}
 
     {{ permalink }}
diff --git a/core/themes/bartik/templates/comment.html.twig b/core/themes/bartik/templates/comment.html.twig
index 1d6718d..58524cd 100644
--- a/core/themes/bartik/templates/comment.html.twig
+++ b/core/themes/bartik/templates/comment.html.twig
@@ -45,21 +45,16 @@
  *
  * These variables are provided to give context about the parent comment (if
  * any):
- * - comment_parent: Full parent comment entity (if any).
+ * - parent_comment: Full parent comment entity (if any).
  * - parent_author: Equivalent to author for the parent comment.
  * - parent_created: Equivalent to created for the parent comment.
  * - parent_changed: Equivalent to changed for the parent comment.
  * - parent_title: Equivalent to title for the parent comment.
  * - parent_permalink: Equivalent to permalink for the parent comment.
- * - parent: A text string of parent comment submission information created from
- *   'parent_author' and 'parent_created' during template_preprocess_comment().
- *   This information is presented to help screen readers follow lengthy
- *   discussion threads. You can hide this from sighted users using the class
- *   visually-hidden.
  *
  * These two variables are provided for context:
  * - comment: Full comment object.
- * - entity: Entity the comments are attached to.
+ * - commented_entity: Entity the comments are attached to.
  *
  * @see template_preprocess_comment()
  */
@@ -82,12 +77,18 @@
         <p class="comment__time comment__submitted__data">{{ created }}</p>
         <p class="comment__permalink comment__submitted__data">{{ permalink }}</p>
         {#
-          // Indicate the semantic relationship between parent and child comments
-          // for accessibility. The list is difficult to navigate in a screen
-          // reader without this information.
+          Indicate the semantic relationship between parent and child comments
+          for accessibility. The list is difficult to navigate in a screen
+          reader without this information.
+          This information is presented to help screen readers follow lengthy
+          discussion threads. You can hide this from sighted users using the class
+          visually-hidden.
         #}
-        {% if parent %}
-          <p class="visually-hidden">{{ parent }}</p>
+        {% if parent_comment %}
+          <p class="visually-hidden">
+            {{ 'In reply to !parent_title by !parent_author'|t({ '!parent_title':
+            parent_title, '!parent_author': parent_author }) }}
+          </p>
         {% endif %}
       </div>
     </div>
diff --git a/core/themes/classy/templates/content/comment.html.twig b/core/themes/classy/templates/content/comment.html.twig
index ba62e2b..8d8e75e 100644
--- a/core/themes/classy/templates/content/comment.html.twig
+++ b/core/themes/classy/templates/content/comment.html.twig
@@ -46,20 +46,15 @@
  * These variables are provided to give context about the parent comment (if
  * any):
  * - comment_parent: Full parent comment entity (if any).
- * - parent_author: Equivalent to author for the parent comment.
+ * - parent_comment: Full parent comment entity (if any).
  * - parent_created: Equivalent to created for the parent comment.
  * - parent_changed: Equivalent to changed for the parent comment.
  * - parent_title: Equivalent to title for the parent comment.
  * - parent_permalink: Equivalent to permalink for the parent comment.
- * - parent: A text string of parent comment submission information created from
- *   'parent_author' and 'parent_created' during template_preprocess_comment().
- *   This information is presented to help screen readers follow lengthy
- *   discussion threads. You can hide this from sighted users using the class
- *   visually-hidden.
  *
  * These two variables are provided for context:
  * - comment: Full comment object.
- * - entity: Entity the comments are attached to.
+ * - commented_entity: Entity the comments are attached to.
  *
  * @see template_preprocess_comment()
  *
@@ -98,12 +93,14 @@
     <p class="submitted">{{ submitted }}</p>
 
     {#
-      Indicate the semantic relationship between parent and child comments
-      for accessibility. The list is difficult to navigate in a screen
-      reader without this information.
+      This information is presented to help screen readers follow lengthy
+      discussion threads. You can hide this from sighted users using the class
+      visually-hidden.
     #}
-    {% if parent %}
-      <p class="parent visually-hidden">{{ parent }}</p>
+    {% if parent_comment %}
+      <p class="parent visually-hidden">{{ 'In reply to !parent_title by
+        !parent_author'|t({ '!parent_title': parent_title, '!parent_author':
+        parent_author }) }}</p>
     {% endif %}
 
     {{ permalink }}