title: Laravel how to add group prefix parameter to route function
body: <p>For example, I have defined routes like this:</p>
  
  <pre><code>$locale = Request::segment(1);
  
  Route::group(array('prefix' =&gt; $locale), function()
  {
    Route::get('/about', ['as' =&gt; 'about', 'uses' =&gt; 'aboutController@index']);
  }
  </code></pre>
  
  <p>I want to generate links for several locales (en, de, es,...). When I try to provide prefix parameter like this</p>
  
  <pre><code>$link = route('about',['prefix' =&gt; 'de']);
  </code></pre>
  
  <p>I got link like this <code>example.com/en/about?prefix=de</code> 
  How to provide prefix param to got link like this <code>example.com/de/about</code></p>