Print Statement languag

Hello Every one!  
When I run the Print Statement, I get two requests, one in spanish, the other one in english.

Since the default installed language is english, I just get information in the english report, my customer needs it in spanish, I undertand I have to go and change the language to every site in other to get it in spanish.

But there is a way I can change this in a massive way?? I have thousands of customers!

Please help!

Thanks

M.