diff -u b/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
--- b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -617,25 +617,13 @@
         break;
     }
 
-    if (!isset($this->changedFields[$name][$this->activeLangcode])) {
-      // A Translation is marked dirty if the translated value of a translatable
-      // field changed or is new.
-      // @todo This detection of modifications needs to be replaced by FieldItemList::equals() as soon it's available
-      // 
-      $value = $this->{$name}->getValue();
-      foreach ($this->get($name) as $key => $field) {
-        $mainPropertyName = $field->mainPropertyName();
-        if (!$mainPropertyName) {
-          // @todo could that happen, that there's no main property?
-          $this->changedFields[$name][$this->activeLangcode] = TRUE;
-          break;
-        }
-        elseif (isset($value[$key][$mainPropertyName]) && (!isset($this->values[$name][$this->activeLangcode][$key][$mainPropertyName])
-          || $value[$key][$mainPropertyName] != $this->values[$name][$this->activeLangcode][$key][$mainPropertyName])
-        ) {
-          $this->changedFields[$name][$this->activeLangcode] = TRUE;
-          break;
-        }
+    if (!isset($this->changedFields[$name][$this->activeLangcode]) && isset($this->values[$name][$this->activeLangcode])) {
+      $items = $this->get($name)->filterEmptyItems();
+      $value = $this->values[$name][$this->activeLangcode];
+      $originalItems = \Drupal::service('plugin.manager.field.field_type')->createFieldItemList($this, $name, $value)->filterEmptyItems();
+      // If the field items are not equal, we mark them changed.
+      if (!$items->equals($originalItems)) {
+        $this->changedFields[$name][$this->activeLangcode] = TRUE;
       }
     }
   }
@@ -1106,32 +1094,2 @@
 
-  /**
-   * {@inheritdoc}
-   */
-  public function getChangedTime() {
-    if ($this->hasField('changed')) {
-      return $this->get('changed')->value;
-    }
-    else {
-      throw new EntityChangedException(
-        sprintf('The entity type %s has no changed field.',
-          $this->getEntityTypeId()
-        )
-      );
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getChangedTimeAcrossTranslations() {
-    $changed = $this->getUntranslated()->getChangedTime();
-    foreach ($this->getTranslationLanguages(FALSE) as $language) {
-      $translation_changed = $this->getTranslation($language->getId())->getChangedTime();
-      if ($translation_changed > $changed) {
-        $changed = $translation_changed;
-      }
-    }
-    return $changed;
-  }
-
 }
reverted:
--- b/core/lib/Drupal/Core/Entity/Exception/EntityChangedException.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\Core\Entity\Exception\EntityTranslationChangedException.
- */
-
-namespace Drupal\Core\Entity\Exception;
-
-/**
- * Exception thrown on erroneous access entity changed timestamps.
- */
-class EntityChangedException extends \Exception {
-}
diff -u b/core/modules/block_content/src/Entity/BlockContent.php b/core/modules/block_content/src/Entity/BlockContent.php
--- b/core/modules/block_content/src/Entity/BlockContent.php
+++ b/core/modules/block_content/src/Entity/BlockContent.php
@@ -8,6 +8,7 @@
 namespace Drupal\block_content\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -77,6 +78,8 @@
    */
   protected $theme;
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/comment/src/Entity/Comment.php b/core/modules/comment/src/Entity/Comment.php
--- b/core/modules/comment/src/Entity/Comment.php
+++ b/core/modules/comment/src/Entity/Comment.php
@@ -10,6 +10,7 @@
 use Drupal\Component\Utility\Number;
 use Drupal\Core\Entity\ContentEntityBase;
 use Drupal\comment\CommentInterface;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -63,6 +64,8 @@
    */
   protected $threadLock = '';
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/content_translation/src/ContentTranslationMetadataWrapperInterface.php b/core/modules/content_translation/src/ContentTranslationMetadataWrapperInterface.php
--- b/core/modules/content_translation/src/ContentTranslationMetadataWrapperInterface.php
+++ b/core/modules/content_translation/src/ContentTranslationMetadataWrapperInterface.php
@@ -109,7 +109,7 @@
 
   /**
    * Returns the timestamp of the last entity change of the current
-   * translations.
+   * translation.
    *
    * @return int
    *   The timestamp of the last entity save operation.
diff -u b/core/modules/file/src/Entity/File.php b/core/modules/file/src/Entity/File.php
--- b/core/modules/file/src/Entity/File.php
+++ b/core/modules/file/src/Entity/File.php
@@ -8,6 +8,7 @@
 namespace Drupal\file\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -37,6 +38,8 @@
  */
 class File extends ContentEntityBase implements FileInterface {
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
--- b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
+++ b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
@@ -8,6 +8,7 @@
 namespace Drupal\menu_link_content\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -59,6 +60,8 @@
    */
   protected $insidePlugin = FALSE;
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/node/src/Entity/Node.php b/core/modules/node/src/Entity/Node.php
--- b/core/modules/node/src/Entity/Node.php
+++ b/core/modules/node/src/Entity/Node.php
@@ -8,6 +8,7 @@
 namespace Drupal\node\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -69,6 +70,8 @@
  */
 class Node extends ContentEntityBase implements NodeInterface {
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraints.php b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraints.php
--- b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraints.php
+++ b/core/modules/system/tests/modules/entity_test/src/Entity/EntityTestConstraints.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\entity_test\Entity;
 
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\EntityChangedInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -32,6 +33,8 @@
  */
 class EntityTestConstraints extends EntityTest implements EntityChangedInterface {
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/taxonomy/src/Entity/Term.php b/core/modules/taxonomy/src/Entity/Term.php
--- b/core/modules/taxonomy/src/Entity/Term.php
+++ b/core/modules/taxonomy/src/Entity/Term.php
@@ -8,6 +8,7 @@
 namespace Drupal\taxonomy\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -56,6 +57,8 @@
  */
 class Term extends ContentEntityBase implements TermInterface {
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
diff -u b/core/modules/user/src/Entity/User.php b/core/modules/user/src/Entity/User.php
--- b/core/modules/user/src/Entity/User.php
+++ b/core/modules/user/src/Entity/User.php
@@ -8,6 +8,7 @@
 namespace Drupal\user\Entity;
 
 use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityChangedTrait;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\BaseFieldDefinition;
@@ -76,6 +77,8 @@
    */
   protected $hostname;
 
+  use EntityChangedTrait;
+
   /**
    * {@inheritdoc}
    */
only in patch2:
unchanged:
--- /dev/null
+++ b/core/lib/Drupal/Core/Entity/EntityChangedTrait.php
@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Entity\EntityChangedTrait.
+ */
+
+namespace Drupal\Core\Entity;
+
+/**
+ * Provides a trait for accessing changed time.
+ */
+trait EntityChangedTrait {
+
+  /**
+   * Returns the timestamp of the last entity change of the current
+   * translation.
+   *
+   * @return int
+   *   The timestamp of the last entity save operation.
+   */
+  public function getChangedTime() {
+    return $this->get('changed')->value;
+  }
+
+  /**
+   * Returns the timestamp of the last entity change across all translations.
+   *
+   * @return int
+   *   The timestamp of the last entity save operation across all
+   *   translations.
+   */
+  public function getChangedTimeAcrossTranslations() {
+    $changed = $this->getUntranslated()->getChangedTime();
+    foreach ($this->getTranslationLanguages(FALSE) as $language) {
+      $translation_changed = $this->getTranslation($language->getId())->getChangedTime();
+      if ($translation_changed > $changed) {
+        $changed = $translation_changed;
+      }
+    }
+    return $changed;
+  }
+
+}