How can i have two languages using the sermepa payment module?

[zand]

Hello,
I am using the sermepa payment module and my costumers end up in the Spanish version of the payment site. I asked the support about how to make this multilingual and they say that they will show my costumers which ever language I choose in the 'Ds_Merchant_ConsumerLanguage' parameter, I can select between "001" (spanish), "002" english and more... but only one parameter can be set in the PHP file (row 104 if you look in the module):

$ds_merchant_consumerlanguage = "001"; 

I tried to put "001, 002" for example (u never know right?) but it didn't work .

My problem is that this parameter is in the PHP file 'includes\modules\payment\sermepa.php' and since I'm new to this whole Zen Cart thing, I wish to ask how to put two of these parameters in my site's Spanish-English folders, so costumers checkout in their own language.
The guy who wrote the module also put this:

  if ($language=='english')
      {
        $ds_merchant_consumerlanguage='002';
      }
      elseif ($language=='catala') 
      {
        $ds_merchant_consumerlanguage='003';
      } 

I think this was an attempt to make this work via the module... but it doesn't, at least not for me...

Thanks for any help,