Change langue in Zend 2

    'service_manager' => array(
        'factories' => array(
            'translator' => 'Zend\I18n\Translator\TranslatorServiceFactory',
        ),
        'abstract_factories' => array(
            'Zend\Cache\Service\StorageCacheAbstractServiceFactory',
            'Zend\Log\LoggerAbstractServiceFactory',
        ),
    ),
    'translator' => array(
        'locale' => 'en_US',
        'translation_file_patterns' => array(
            array(
                'type'     => 'gettext',
                'base_dir' => __DIR__ . '/../language',
                'pattern'  => '%s.mo',
            ),
        ),
    ),



AND
class Module
{
    public function onBootstrap(MvcEvent $e)
    {
        $eventManager        = $e->getApplication()->getEventManager();
        $moduleRouteListener = new ModuleRouteListener();
        $moduleRouteListener->attach($eventManager);
       
        $translator = $e->getApplication()->getServiceManager()->get('translator');
        $translator->setLocale("fr_FR");
    }
}