/**
 * Implements hook_field_language_alter().
 */
function {{ machine_name }}_field_language_alter(&$display_language, $context) {
  // Do not apply core language fallback rules if they are disabled or if Locale
  // is not registered as a translation handler.
  if (variable_get('locale_field_language_fallback', TRUE) && field_has_translation_handler($context['entity_type'], 'locale')) {
    locale_field_language_fallback($display_language, $context['entity'], $context['language']);
  }
}