Can not install? I worked hard and I finally make it work.  Now I give my cooperation to those who have difficulty in installation and initial use.

Hello... Hummm... This is a difficult question. The language file is selected when you configure hcl... so i think is not possible. But i'm not sure - Sorry my friend! Ask Spenser, please.

Thanks for your ansered, but, i found a solution.   For those interested:
1 - create a new department for the french language
2 - generate a new code for this department to include in the page i want the hcl module appears
3 - create a french.   php file (translate the english.   php file in french)
4 - install it in the hcl/lang directory
5 - edit the hcl/ config.   php file and replace the line 79 ($conf['lang'] = 'english'; ) by the following code:
  
if (isset($_GET['departmentid']) ) {  // the departmentid is generated when you create a new department  
       if ($_GET['departmentid'] == 2){   // id of my 2nd department
      $conf['lang'] = 'french';
      }else{
      $conf['lang'] = 'english';
      }
     }
        else{         // for the admin side (if you omit it, you will have an error in your admin page)
      $conf['lang'] = 'english';        
   }