Undefined index: fr in field_collection_bulkupload_add_form

  function field_collection_bulkupload_field_attach_form($entity_type, $entity, &$form, &$form_state, $langcode) {
    $fields = field_info_instances($entity_type, $form['#bundle']);
    foreach($fields as $name => $field) {
      if ($field['widget']['type'] == 'field_collection_embed') {
        $build_id = $form_state['build_info']['form_id'];
+       $langcode = field_language($entity_type, $entity, $name, $langcode);
        field_collection_bulkupload_add_form($form[$name], $name, $langcode, $build_id);
      }
    }
  }