Symfony\Component\Translation\Translator::transChoice PHP Method

    public function transChoice($id, $number, array $parameters = array(), $domain = 'messages', $locale = null)
    {
        if (!isset($locale)) {
            $locale = $this->getLocale();
        }

        if (!isset($this->catalogues[$locale])) {
            $this->loadCatalogue($locale);
        }

        return strtr($this->selector->choose($this->catalogues[$locale]->get((string) $id, $domain), (int) $number, $locale), $parameters);
    }

 public function buildForm(FormBuilderInterface $builder, array $options)
 {
     $section = $this->section;
     $builder->add('prenom', "text")->add('nom', "text")->add('email', 'email')->add('sexe', 'choice', array('choices' => array('m' => $this->translator->trans('label.male'), 'f' => $this->translator->trans('label.female'))))->add('dob', 'date', array('required' => false, 'input' => 'datetime', 'widget' => 'single_text', 'format' => 'dd/MM/yyyy'))->add('arrival', 'date', array('required' => false, 'input' => 'datetime', 'widget' => 'single_text', 'format' => 'dd/MM/yyyy'))->add('nbsemester', 'choice', array('multiple' => false, 'expanded' => true, 'choices' => array(1 => "1 " . $this->translator->transChoice('label.semester', 1), 2 => "2 " . $this->translator->transChoice('label.semester', 2))))->add('submit', "submit")->add('password', 'repeated', array('type' => 'password', 'invalid_message' => 'Le mot de passe doit être indentique à sa confirmation.', 'required' => true))->add('conditionGenerale', 'checkbox', array('required' => true, 'label' => "J'accepte les conditions générales d'utilisations"))->add('nationalite', 'entity', array('label' => 'Status Name', 'empty_value' => $this->translator->trans('label.form.nationality'), 'class' => 'BuddySystem\\MembersBundle\\Entity\\Nationality', 'property' => 'nationality'))->add('universite', 'entity', array('label' => 'Status Name', 'empty_value' => 'crud.form.university', 'class' => 'BuddySystem\\MembersBundle\\Entity\\Univercity', 'query_builder' => function (UniversityRepository $ur) use($section) {
         return $ur->getUniversitiesBySection($section, true);
     }, 'required' => false))->add('comment');
 }