<ul class="nav btn">
     <li class="dropdown">
       <a class="dropdown-toggle" data-toggle="dropdown" href="#">
         <%= t('landing_page.lang') %>
         <span class="caret"></span>
       </a>
       <ul class="dropdown-menu dropdown-menu-right" role="menu">
         <li>
           <%= link_to t('landing_page.en'), change_locale_path(:en) %>
         </li>
         <li>
           <%= link_to t('landing_page.pt-BR'), change_locale_path(:"pt-BR") %>
         </li>
       </ul>
     </li>
 </ul>