diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index 1efa344..ef36dde 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -9,6 +9,7 @@
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\EntityWithPluginCollectionInterface;
+use Drupal\Core\Entity\SynchronizableEntityTrait;
 use Drupal\Core\Plugin\PluginDependencyTrait;
 
 /**
@@ -21,6 +22,7 @@
   use PluginDependencyTrait {
     addDependency as addDependencyTrait;
   }
+  use SynchronizableEntityTrait;
 
   /**
    * The original ID of the configuration entity.
@@ -48,14 +50,6 @@
   protected $uuid;
 
   /**
-   * Whether the config is being created, updated or deleted through the
-   * import process.
-   *
-   * @var bool
-   */
-  private $isSyncing = FALSE;
-
-  /**
    * Whether the config is being deleted by the uninstall process.
    *
    * @var bool
@@ -206,22 +200,6 @@ public function status() {
   /**
    * {@inheritdoc}
    */
-  public function setSyncing($syncing) {
-    $this->isSyncing = $syncing;
-
-    return $this;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function isSyncing() {
-    return $this->isSyncing;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function setUninstalling($uninstalling) {
     $this->isUninstalling = $uninstalling;
   }
diff --git a/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
index b4d73c0..efbf916 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -23,6 +23,7 @@
   use EntityChangesDetectionTrait {
     getFieldsToSkipFromTranslationChangesCheck as traitGetFieldsToSkipFromTranslationChangesCheck;
   }
+  use SynchronizableEntityTrait;
 
   /**
    * The plain data values of the contained fields.
@@ -177,14 +178,6 @@
   protected $enforceRevisionTranslationAffected = [];
 
   /**
-   * Whether this entity is being created, updated or deleted through a
-   * synchronization process.
-   *
-   * @var bool
-   */
-  private $isSyncing = FALSE;
-
-  /**
    * {@inheritdoc}
    */
   public function __construct(array $values, $entity_type, $bundle = FALSE, $translations = []) {
@@ -923,6 +916,7 @@ protected function initializeTranslation($langcode) {
     $translation->loadedRevisionId = &$this->loadedRevisionId;
     $translation->isDefaultRevision = &$this->isDefaultRevision;
     $translation->enforceRevisionTranslationAffected = &$this->enforceRevisionTranslationAffected;
+    $translation->isSyncing = &$this->isSyncing;
 
     return $translation;
   }
@@ -1221,6 +1215,9 @@ public function __clone() {
     $is_revision_translation_affected_enforced = $this->enforceRevisionTranslationAffected;
     $this->enforceRevisionTranslationAffected = &$is_revision_translation_affected_enforced;
 
+    $is_syncing = $this->isSyncing;
+    $this->isSyncing = &$is_syncing;
+
     foreach ($this->fields as $name => $fields_by_langcode) {
       $this->fields[$name] = [];
       // Untranslatable fields may have multiple references for the same field
@@ -1464,20 +1461,4 @@ public function isDefaultTranslationAffectedOnly() {
     return !empty($bundle_info[$bundle_name]['untranslatable_fields.default_translation_affected']);
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function setSyncing($syncing) {
-    $this->isSyncing = $syncing;
-
-    return $this;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function isSyncing() {
-    return $this->isSyncing;
-  }
-
 }
diff --git a/core/lib/Drupal/Core/Entity/SynchronizableEntityTrait.php b/core/lib/Drupal/Core/Entity/SynchronizableEntityTrait.php
new file mode 100644
index 0000000..4b7f793
--- /dev/null
+++ b/core/lib/Drupal/Core/Entity/SynchronizableEntityTrait.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Drupal\Core\Entity;
+
+/**
+ * Provides a trait for accessing synchronization information.
+ *
+ * @ingroup entity_api
+ */
+trait SynchronizableEntityTrait {
+
+  /**
+   * Whether this entity is being created, updated or deleted through a
+   * synchronization process.
+   *
+   * @var bool
+   */
+  protected $isSyncing = FALSE;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setSyncing($syncing) {
+    $this->isSyncing = $syncing;
+
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isSyncing() {
+    return $this->isSyncing;
+  }
+
+}