formulaire imbriquer

Bonjour,
je cherche a faire un formulaire pour un slider qui aurait une image et un titre en francais et ou en anglais.
je cherche a mettre dans le form un tab pill boostrap mais je vous pas comment.
ou un bouton qui switch un input de fr a en.
voici les entity

<?php

namespace Cz\AdminBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Carrousel
 *
 * @ORM\Table(name="cz_adminbundle_carrousel")
 * @ORM\Entity(repositoryClass="Cz\AdminBundle\Repository\CarrouselRepository")
 */
class Carrousel extends \Kunstmaan\AdminBundle\Entity\AbstractEntity
{
    /**
     * @var string
     *
     * @ORM\Column(name="format", type="boolean")
     */
    private $format;

    /**
     * @ORM\OneToOne(targetEntity="Cz\AdminBundle\Entity\MediaAdmin", cascade={"persist","remove"})
     * @ORM\JoinColumn(nullable=false)
     */
    private $image;

    /**
     * @ORM\OneToOne(targetEntity="Cz\AdminBundle\Entity\CarrouselName", cascade={"persist","remove"})
     * @ORM\JoinColumn(nullable=false)
     */
    private $locale;

    /**
     * @var boolean
     *
     * @ORM\Column(name="fleche", type="boolean")
     */
    private $fleche;

    /**
     * Set format
     *
     * @param string $format
     *
     * @return Carrousel
     */
    public function setFormat($format)
    {
        $this->format = $format;

        return $this;
    }

    /**
     * Get format
     *
     * @return string
     */
    public function getFormat()
    {
        return $this->format;
    }

    /**
     * Set image
     *
     * @param \Cz\AdminBundle\Entity\MediaAdmin $image
     * @return Produits
     */
    public function setImage(\Cz\AdminBundle\Entity\MediaAdmin $image)
    {
        $this->image = $image;

        return $this;
    }

    /**
     * Get image
     *
     * @return \Cz\AdminBundle\Entity\MediaAdmin
     */
    public function getImage()
    {
        return $this->image;
    }

    /**
     * Set fleche
     *
     * @param boolean $fleche
     *
     * @return Carrousel
     */
    public function setFleche($fleche)
    {
        $this->fleche = $fleche;

        return $this;
    }

    /**
     * Get fleche
     *
     * @return boolean
     */
    public function getFleche()
    {
        return $this->fleche;
    }

    /**
     * Set locale
     *
     * @param \Cz\AdminBundle\Entity\CarrouselName $locale
     *
     * @return Carrousel
     */
    public function setLocale(\Cz\AdminBundle\Entity\CarrouselName $locale)
    {
        $this->locale = $locale;

        return $this;
    }

    /**
     * Get locale
     *
     * @return \Cz\AdminBundle\Entity\CarrouselName
     */
    public function getLocale()
    {
        return $this->locale;
    }
}

<?php

namespace Cz\AdminBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Carrousel
 *
 * @ORM\Table(name="cz_adminbundle_carrousel_name")
 * @ORM\Entity(repositoryClass="Cz\AdminBundle\Repository\CarrouselRepository")
 */
class CarrouselName extends \Kunstmaan\AdminBundle\Entity\AbstractEntity
{

    /**
     * @var string
     *
     * @ORM\Column(name="title", type="string", length=255)
     */
    private $title;

    /**
     * @var string
     *
     * @ORM\Column(name="locale", type="string", length=255)
     */
    private $locale;

    /**
     * Set title
     *
     * @param string $title
     *
     * @return CarrouselName
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Set locale
     *
     * @param string $locale
     *
     * @return CarrouselName
     */
    public function setLocale($locale)
    {
        $this->locale = $locale;

        return $this;
    }

    /**
     * Get locale
     *
     * @return string
     */
    public function getLocale()
    {
        return $this->locale;
    }
}

les formulaire imbriquer:

<?php

namespace Cz\AdminBundle\Form;

use Cz\AdminBundle\Form\MediaAdminType;
use Cz\AdminBundle\Form\CarrouselNameType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;

class CarrouselType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('format',ChoiceType::class, array(
                'choices'  => array(
                    1 => 'Pleine Larger',
                    0 => 'Normal'
                )))
            ->add('image',new MediaAdminType())

            ->add('locale', new CarrouselNameType())
            ->add('fleche',CheckboxType::class)

        ;
    }

    /**
     * Sets the default options for this type.
     *
     * @param OptionsResolver $resolver The resolver for the options.
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Cz\AdminBundle\Entity\Carrousel'
        ));
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'cz_adminbundle_carrousel';
    }
}

  <?php

namespace Cz\AdminBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;

class CarrouselNameType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {

        $builder

            ->add('title',TextType::class
    )
            ->add('locale',ChoiceType::class, array(
                'label'=> false,
                'choices'  => array(
                    'fr' => 'FRANCAIS',
                    'en' => 'ENGLAIS'
                )))

        ;
    }

    /**
     * Sets the default options for this type.
     *
     * @param OptionsResolver $resolver The resolver for the options.
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Cz\AdminBundle\Entity\CarrouselName'
        ));
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'cz_adminbundle_carrousel';
    }
}

merci d'avance pour votre aide