I have this application module config file in /module/Application/config/module.config.php

 
return array(
    'router' => array(
        'routes' => array(
            'home' => array(
                'type' => 'Literal',
                'options' => array(
                    'route'    => '/',
                    'defaults' => array(
                        'controller' => 'Application',
                        'action'     => 'index',
                    ),
                ),
            ),
            'application' => array(
                'type'    => 'segment',
                'options' => array(
                    'route'    => '[/:locale][/:controller][/:action][/:id]',
                    'constraints' => array(
                        'locale'     => '[a-z]{2}',
                        'controller' => '[a-zA-Z][a-zA-Z0-9_-]*',
                        'action'     => '[a-zA-Z][a-zA-Z0-9_-]*',
                        'id'         => '[0-9]+',
                    ),
                    'defaults' => array(
                        'controller' => 'Application',
                        'action'     => 'index',
                        'locale'     => 'de',
                    ),
                ),
                'may_terminate' => true,
                'child_routes' => array(
                    'default' => array(
                        'type'    => 'Wildcard',
                        'options' => array(
                        ),
                    ),
                ),
            ),
        ),
    ),
    'controllers' => array(
        'invokables' => array(
            'Application' => 'Application\Controller\IndexController',
        ),
    ),
);

The routing itself works perfectly. But when I want to create an Url with the url view helper or the url controller plugin I don't get the expected result. Here is an example from a view script:

 
<?php echo $this->url('application', array('locale' => 'de', 'action'=>'add', 'controller' => 'application')); ?>

And here from a controller:

 
echo $this->url()->fromRoute('application', array('action' => 'add', 'controller' => 'application', 'locale' => 'de'));

Both output

/application/add

and not the expected

/de/application/add

Renaming the locale segment or changing the order of the segments does not help. But when I clear the default for the locale then it does work.