Servired Payment Plugin multilanguage function

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4
-- PHP version -- : 5.6.8
-- Browser(s) name and version -- : Firefox 38.0.5

Hello,

We are using your servired payment plugin included with Hikashop 2.4.0 Business package.
We see that there is no option to choose language when we set up this method of payment, so as we are located in Spain our international clients are redirected to spanish version of Bank La Caixa for credit card payment.
We need to correctly trace international clients to english version and spanish clients to spanish version.

From bank support they told us that parameter " Ds_Merchant_ConsumerLanguage" control this function with "0" as default. Here are codes for each country Spanish-001, English-002, 003-Catalan, French-004, 005 German, Dutch-006, Italian-007-008 Swedish, Portuguese 009, Valenciano-010, Polish-011, 012 and Euskera Gallego-013.

Do you plan to implement this language option?

Thank you for your help

Thank you Nicolas for your quick reply and solution.

Now the bank screen (La Caixa) change to english thats perfect!
But english remains even if we switch to spanish.

Thank again for your help!

Jerzy