Newscoop\NewscoopBundle\Entity\Repository\TopicRepository::getTranslatableTopicLocale PHP Method

    public function getTranslatableTopicLocale(Topic $topic)
    {
        foreach ($topic->getTranslations()->toArray() as $translation) {
            if ($translation->getField() == 'title' && $topic->getTitle() == $translation->getContent()) {
                return $translation->getLocale();
            }
        }
    }