_locale_refresh_configuration example

if (isset($page)) {
      $form_state->setRedirect(
        'locale.translate_page',
        [],
        ['page' => $page]
      );
    }

    if ($updated) {
      // Clear cache and force refresh of JavaScript translations.       _locale_refresh_translations([$langcode], $updated);
      _locale_refresh_configuration([$langcode], $updated);
    }
  }

}