header.php

<div class="pure-u-1-3">
    <!-- #language-switcher -->
    <?php if (is_active_sidebar('trailing_main_nav')) : ?>
        <div id="trailing_main_nav" class="widget-area">
            <?php dynamic_sidebar('trailing_main_nav'); ?>
        </div>
    <?php endif; ?>
    <!-- /#language-switcher -->
</div>