diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
index 09bda28..96de87f 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
@@ -155,13 +155,12 @@ public function form(FieldInterface $items, array &$form, array &$form_state, $g
   protected function formMultipleElements(FieldInterface $items, array &$form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
     $cardinality = $this->fieldDefinition->getFieldCardinality();
-    $langcode = $items->getParent()->language()->id;
     $parents = $form['#parents'];
 
     // Determine the number of widgets to display.
     switch ($cardinality) {
       case FIELD_CARDINALITY_UNLIMITED:
-        $field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
+        $field_state = field_form_get_state($parents, $field_name, $items->getLangcode(), $form_state);
         $max = $field_state['items_count'];
         $is_multiple = TRUE;
         break;
@@ -229,7 +228,7 @@ protected function formMultipleElements(FieldInterface $items, array &$form, arr
           '#name' => strtr($id_prefix, '-', '_') . '_add_more',
           '#value' => t('Add another item'),
           '#attributes' => array('class' => array('field-add-more-submit')),
-          '#limit_validation_errors' => array(array_merge($parents, array($field_name, $langcode))),
+          '#limit_validation_errors' => array(array_merge($parents, array($field_name, $items->getLangcode()))),
           '#submit' => array('field_add_more_submit'),
           '#ajax' => array(
               'callback' => 'field_add_more_js',
@@ -254,7 +253,7 @@ protected function formSingleElement(FieldInterface $items, $delta, array $eleme
       '#bundle' => $entity->bundle(),
       '#entity' => $entity,
       '#field_name' => $this->fieldDefinition->getFieldName(),
-      '#language' => $entity->language()->id,
+      '#language' => $items->getLangcode(),
       '#field_parents' => $form['#parents'],
       // Only the first widget should be required.
       '#required' => $delta == 0 && $this->fieldDefinition->isFieldRequired(),
@@ -284,7 +283,7 @@ protected function formSingleElement(FieldInterface $items, $delta, array $eleme
    */
   public function extractFormValues(FieldInterface $items, array $form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
-    $langcode = $items->getParent()->language()->id;
+    $langcode = $items->getLangcode();
 
     // Extract the values from $form_state['values'].
     $path = array_merge($form['#parents'], array($field_name, $langcode));
@@ -338,7 +337,7 @@ public function extractFormValues(FieldInterface $items, array $form, array &$fo
    */
   public function flagErrors(FieldInterface $items, array $form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
-    $langcode = $items->getParent()->language()->id;
+    $langcode = $items->getLangcode();
 
     $field_state = field_form_get_state($form['#parents'], $field_name, $langcode, $form_state);
 
diff --git a/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php b/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
index ad74743..722c224 100644
--- a/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
+++ b/core/modules/file/lib/Drupal/file/Plugin/field/widget/FileWidget.php
@@ -63,14 +63,12 @@ public function settingsSummary() {
    */
   protected function formMultipleElements(FieldInterface $items, array &$form, array &$form_state) {
     $field_name = $this->fieldDefinition->getFieldName();
-    $langcode = $items->getParent()->language()->id;
-
     $parents = $form['#parents'];
 
     // Load the items for form rebuilds from the field state as they might not be
     // in $form_state['values'] because of validation limitations. Also, they are
     // only passed in as $items when editing existing entities.
-    $field_state = field_form_get_state($parents, $field_name, $langcode, $form_state);
+    $field_state = field_form_get_state($parents, $field_name, $items->getLangcode(), $form_state);
     if (isset($field_state['items'])) {
       $items->setValue($field_state['items']);
     }