'url' => 'rapsys_air'
                        ],
                        'copy' => [
-                               'long' => 'John Doe all rights reserved',
+                               'long' => 'All rights reserved',
                                'short' => 'Copyright 2019'
                        ],
                        'contact' => [
                                'name' => 'John Doe',
                                'mail' => 'contact@example.com'
                        ],
-                       'locales' => '%kernel.translator.fallbacks%'
+                       'locale' => '%kernel.default_locale%',
+                       'locales' => '%kernel.translator.fallbacks%',
+                       'languages' => '%rapsys_user.languages%',
                ];
 
                //Here we define the parameters that are allowed to configure the bundle.
                                                        ->scalarNode('mail')->cannotBeEmpty()->defaultValue($defaults['contact']['mail'])->end()
                                                ->end()
                                        ->end()
+                                       ->scalarNode('locale')->cannotBeEmpty()->defaultValue($defaults['locale'])->end()
                                        ->scalarNode('locales')->cannotBeEmpty()->defaultValue($defaults['locales'])->end()
+                                       ->scalarNode('languages')->cannotBeEmpty()->defaultValue($defaults['languages'])->end()
+                                       /*->arrayNode('languages')
+                                               ->treatNullLike([])
+                                               ->defaultValue($defaults['languages'])
+                                               ->scalarPrototype()->end()
+                                       ->end()*/
                                ->end()
                        ->end();
 
 
                //Set translator fallbacks
                $container->setParameter('kernel.translator.fallbacks', $framework['translator']['fallbacks']);
 
+               //Set default locale
+               $container->setParameter('kernel.default_locale', $framework['default_locale']);
+
+               //Load rapsys_user configurations
+               //XXX: required to extract default_locale and translation.fallbacks
+               $rapsys_users = $container->getExtensionConfig('rapsys_user');
+
+               //Recursively merge rapsys_user configurations
+               $rapsys_user = array_reduce(
+                       $rapsys_users,
+                       function ($res, $i) {
+                               return array_merge_recursive($res, $i);
+                       },
+                       []
+               );
+
+               //Set rapsys_user.languages key
+               $container->setParameter('rapsys_user.languages', $rapsys_user['languages']);
+
                //Process the configuration
                $configs = $container->getExtensionConfig($this->getAlias());
 
 
                //Store flattened array in parameters
                //XXX: don't flatten rapsys_air.site.png key which is required to be an array
-               foreach($this->flatten($config, $this->getAlias(), 10, '.', ['rapsys_air.site.png', 'rapsys_air.locales']) as $k => $v) {
+               foreach($this->flatten($config, $this->getAlias(), 10, '.', ['rapsys_air.site.png', 'rapsys_air.locales', 'rapsys_air.languages']) as $k => $v) {
                        $container->setParameter($k, $v);
                }
        }