diff -u b/core/modules/edit/lib/Drupal/edit/Access/EditEntityFieldAccessCheck.php b/core/modules/edit/lib/Drupal/edit/Access/EditEntityFieldAccessCheck.php
--- b/core/modules/edit/lib/Drupal/edit/Access/EditEntityFieldAccessCheck.php
+++ b/core/modules/edit/lib/Drupal/edit/Access/EditEntityFieldAccessCheck.php
@@ -98,7 +98,7 @@
       throw new NotFoundHttpException();
     }
     $langcode = $request->attributes->get('langcode');
-    if (!$langcode || (field_valid_language($langcode) !== $langcode)) {
+    if (!$langcode || (field_valid_language($langcode) !== $langcode) || !$entity->hasTranslation($langcode)) {
       throw new NotFoundHttpException();
     }
     if (!($field_definition = $entity->getTranslation($langcode)->get($field_name)->getFieldDefinition())) {