Set a default locale for your application in Zend Framework 2

Module.php

<?php
namespace Application;

use Locale;
use Zend\EventManager\EventInterface;
use Zend\ModuleManager\Feature;

class Module implements
    Feature\BootstrapListenerInterface
{
    public function onBootstrap(Event $e)
    {
        $default   = 'en';
        $supported = array('en', 'nl');
        $app       = $e->getApplication();
        $headers   = $app->getRequest()->getHeaders();

        if ($headers->has('Accept-Language')) {
            $header = $headers->get('Accept-Language')->getFieldValue();
            $locale = Locale::lookup($supported, $header, $default);
            Locale::setDefault($locale);
        } else {
            Locale::setDefault($default);
        }
    }
}