FrontBundle/Resources/views/Template/Default/_header.html.twig
<header class="row well header">
<div class="pull-left">
{{ render_shared_block('logo', app.request.locale, site.siteId) }}
{{ create_block('menu') }}
</div>
<div class="pull-right">
{{ create_block('language_list') }}
</div>
</header>