diff --git a/core/lib/Drupal/Core/Field/FormatterPluginManager.php b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
index 7434fe0..cffd8ec 100644
--- a/core/lib/Drupal/Core/Field/FormatterPluginManager.php
+++ b/core/lib/Drupal/Core/Field/FormatterPluginManager.php
@@ -69,7 +69,10 @@ public function createInstance($plugin_id, array $configuration = array()) {
       return $plugin_class::create(\Drupal::getContainer(), $configuration, $plugin_id, $plugin_definition);
     }
 
-    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $configuration['settings_langcode']);
+    // Make sure that the settings langcode is set but not persistent.
+    $settings_langcode = isset($configuration['settings_langcode']) ? $configuration['settings_langcode'] : '';
+
+    return new $plugin_class($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $settings_langcode);
   }
 
   /**
@@ -148,7 +151,6 @@ public function prepareConfiguration($field_type, array $configuration) {
       'label' => 'above',
       'settings' => array(),
       'third_party_settings' => array(),
-      'settings_langcode' => '',
     );
     // If no formatter is specified, use the default formatter.
     if (!isset($configuration['type'])) {