diff --git a/core/lib/Drupal/Core/Entity/EntityChangedInterface.php b/core/lib/Drupal/Core/Entity/EntityChangedInterface.php
index 8f57863d94..a28fe16850 100644
--- a/core/lib/Drupal/Core/Entity/EntityChangedInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityChangedInterface.php
@@ -37,9 +37,10 @@ public function setChangedTime($timestamp);
   /**
    * Gets the timestamp of the last entity change across all translations.
    *
-   * This method will return the highest timestamp across all translations. If
-   * you need to check that no translation was changed after a certain time, you
-   * have to check each translation's timestamp individually.
+   * This method will return the highest timestamp across all translations. To
+   * check that no translation is older than in another version of the entity
+   * (e.g. to avoid overwriting newer translations with old data), compare each
+   * translation to the other version individually.
    *
    * @return int
    *   The timestamp of the last entity save operation across all
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php
index 271e24def2..6bb7665d3a 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityChangedConstraintValidator.php
@@ -18,18 +18,18 @@ public function validate($entity, Constraint $constraint) {
       /** @var \Drupal\Core\Entity\EntityInterface $entity */
       if (!$entity->isNew()) {
         $saved_entity = \Drupal::entityManager()->getStorage($entity->getEntityTypeId())->loadUnchanged($entity->id());
-        // Ensure that all the entity translations match their current version
-        // in the storage in order to avoid reverting other changes. The entity
-        // object might contain an older entity translation when a translation
-        // is being concurrently edited. If the form that is submitted last
-        // is not yet cached, the entity will be retrieved from the entity
-        // storage on submit, and that entity object will be the updated one
-        // from the previous form submission. To prevent the entity from the
+        // Ensure that all the entity translations are the same as or newer
+        // than their current version in the storage in order to avoid
+        // reverting other changes. The entity object that is being saved might
+        // contain an older entity translation when different translations are
+        // being concurrently edited. The form that is submitted last will
+        // retrieve the entity from the storage on submit, and that entity
+        // object will be the updated one from the previous form submission,
+        // containing the new saved timestamps. To prevent the entity from the
         // second submission from being saved and overwriting changes from the
-        // first, the changed timestamp can be added to the form so that it
-        // updates the entity object on submit. We use the timestamp to
-        // determine when a previous entity translation version has been edited
-        // and is currently being saved.
+        // first, we use the submmitted translations' timestamps to determine
+        // when a previous entity translation version has been edited and is
+        // currently being saved.
         // @see \Drupal\node\NodeForm::form().
         if ($saved_entity) {
           $common_translation_languages = array_intersect_key($entity->getTranslationLanguages(), $saved_entity->getTranslationLanguages());