<form action="/search" method="get">
  <input type="hidden" name="lang" value="{{ language.locale }}">
  <input type="text" name="q" value="" placeholder="Поиск"/>
  <button type="submit">Поиск</button>
</form>
        
      

        
          
$.get('/search.json', {q: 'товар'}, function(products) {
  console.log(products);
});