<form action="{{ search_url }}" method="get">
    {% if language.not_default? %} <input type="hidden" name="lang" value="{{ language.locale }}"> {% endif %}
      <input type="text" name="q" value="{{search.query | escape}}" id="left_search_field" /> <input type="submit" value="Поиск" id="left_search_button" />
 </form>