[fw-general] Zend_Controller_Router_Route: Could not find a translator

[info]

I am developing a multilanguage application. In the bootstrap there is  
the routes setup:

    protected function _initRoutes() {
        $this->bootstrap('frontController');
        $router = $this->frontController->getRouter();

        // PAGES ROUTE
        $page = new Zend_Controller_Router_Route(
            ':language/:ident',
            array(
                'module' => 'core',
                'controller' => 'pagine',
                'action' => 'view'
            ),
            array(
                'ident' => '[a-zA-Z-_0-9]{3,}',
                'language' => '[a-z]{2}'
            )
        );

        $registrazione = new Zend_Controller_Router_Route(
            ':language/@utenti/@registrati',
            array(
                'module' => 'core',
                'controller' => 'utenti',
                'action' => 'registrazione'
            ),
            array(
                'language' => '[a-z]{2}'
            )
        );

        $router->addRoute('page', $page);
        $router->addRoute('registrazione', $registrazione);

        .....
}


In the bootstrap, I cannot set the default translator to  
Zend_Controller_Router_Route (for translated segments) because i don't  
know the language parameter in the request object.
I get the language parameter in Multilanguage Plugin during the  
"routeShutdown":

    class Activa_Controller_Plugin_Multilanguage extends  
Zend_Controller_Plugin_Abstract {

    public function routeShutdown(Zend_Controller_Request_Abstract $request) {
        $language = $request->getParam("language");
        $locale   = new Zend_Locale($language);

        $translate = new Zend_Translate('array',  
APPLICATION_PATH.'/config/lang/'.$language.'.php', $locale);

        Zend_Registry::set('Zend_Locale', $locale);
        Zend_Registry::set('Zend_Translate', $translate);

        Zend_Controller_Router_Route::setDefaultTranslator($translate);
        ////////////////////////
        // BUT NOW IS TOO LATE
        ////////////////////////
    }

When i type the address "http://servername/it/utenti/registrati"; i get  
the exception with the message "Could not find a translator".

How can i fix it?
Antonio (Italy)