Support for multilanguage sites, Internationalization (I18N)

[enri]

sorry, I don't get it. so none of those solutions are acceptable for you ?

No, now I use this code but I can't move submenu from the end of top level menu

<nav id="main-menu" class="level-0">

<ul>
    <?php get_i18n_navigation(return_page_slug()); ?>
       <li class="menu-item-has-children"><a href="about">About</a>
   <ul class="sub-menu">
       <?php get_i18n_navigation('about',1,99); ?>
   </ul>
      </li>
</ul> 

<div class="close-button"></div>
</nav>