Print translated SAP SCRIPT depending on WERKS

Hi All,

I've translated a SAP SCRIPT (production order - CO02/CO03) from Italian to Serbian using SE76.

I need to print in IT (italian) or in SH (serbian) depending on the WERKS of the production order (1100 -> IT, 2000 -> SH). I can't use system language 'cause users may log on in IT, SH or EN depending on what they prefers.

I read in other discussions about the FM OPEN_FORM; at the moment i have this setup:

call function 'OPEN_FORM'

     exporting

       device   = 'PRINTER'

       dialog   = space

       form     = print_co-forml

       language = print_co-spras

       options  = print_opts

     exceptions

       canceled = 01

       device   = 02

       form     = 03

       options  = 04

       unclosed = 05.

   call function 'START_FORM'

     exporting

       startpage = startpage.

How can I do this?