Get localized url while rendering template in multiple locales

Description

UrlHelper check $localeId != craft()->language to return url, but will return the old one if craft()->language has changed.

I want to send notifications in my app, those messages will be localized and sent to users in their prefferedLocale thus I am precompiling a message for every locale and then sending them to the targeted users.

Problem is I didn’t find any locale parameter to give to the craft()->templates->render() method and so I am updating the app language (craft()->setLanguage($locale);) before every rendering (craft email service behave like that).
Works well but now when I try to get the url I always end up with the English one.

And so my message is well translated but the url I save always links to the English page.

Steps to reproduce

function example($entryId) {
    $locales =   craft()->i18n->getSiteLocaleIds();
    $currentLocale = craft()->getLanguage();
    $localizedData = [];

    foreach ($locales as $locale) {
      craft()->setLanguage($locale);

      $criteria = craft()->elements->getCriteria(ElementType::Entry);
      $criteria->locale = $locale;
      $criteria->id = $entryId;
      $entry = $criteria->first();

      // this is working well, the rendering is done in the right locale
      $message = craft()->templates->render('a template', $messageParams);

      $url = $entry->getUrl(); // always same localized url

      $localizedData['notification'][$locale] = $notification;
    }
    // back to normal
    craft()->setLanguage($currentLocale);
  }

The thing is that if I do

craft()->setLanguage('yolo');
  $url->url = $entry->getUrl();
 craft()->setLanguage($currentLocale);

It will work well since $localeId != craft()->language and the url will be re-built.

I don't know if it's a bug, maybe I shouldn't modify craft()->language like that but I didn't find any other way for my template to be rendered in multiple locales. If it's not considered a bug, please advise on the correct way to do it.

Thanks

Additional info

• Craft version: 2.6.3012
• PHP version: 7.0.22
• Database driver & version:
• Plugins & versions:

Start with UrlHelper's locale check and the interaction between craft()->setLanguage(), templates->render(), and $entry->getUrl(). Reproduce the loop from the issue across site locales, then trace why the URL remains cached or tied to the previous language. Done means each rendered notification receives the URL for its target locale without breaking the language restoration step.