diff --git a/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
index 99cbd86671..eece7134b1 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -422,7 +422,12 @@ public function setRevisionTranslationAffectedEnforced($enforced) {
   }
 
   /**
-   * {@inheritdoc}
+   * Overrides isDefaultTranslation() result.
+   *
+   * @param bool|null $is_default_translation
+   *   If boolean value is passed, the value will override the result of
+   *   isDefaultTranslation() method. If NULL is passed, the default logic will
+   *   be used for determining the result.
    */
   public function setIsDefaultTranslation(bool $is_default_translation = NULL) {
     $this->isDefaultTranslation = $is_default_translation;
diff --git a/core/lib/Drupal/Core/TypedData/TranslatableInterface.php b/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
index 988df1f4ec..7aa0cb1973 100644
--- a/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TranslatableInterface.php
@@ -30,18 +30,6 @@ interface TranslatableInterface {
    */
   public function language();
 
-  /**
-   * Overrides isDefaultTranslation() result.
-   *
-   * @param bool|null $is_default_translation
-   *   If boolean value is passed, the value will override the result of
-   *   isDefaultTranslation() method. If NULL is passed, the default logic will
-   *   be used for determining the result.
-   *
-   * @internal
-   */
-  public function setIsDefaultTranslation(bool $is_default_translation = NULL);
-
   /**
    * Checks whether the translation is the default one.
    *