smartform ( PO header text and item text )

Hi,

In my smartform include text I am passing language key as 'EN'.

But for particular PO when I checked entries in STXH table TDSPRAS field has value 'T'(Turkish ).

Hence header and item text are not getting displayed...

What I want to ask is.... From where This TDSPRAS field in STXH get value...is some functional seeting?? or log-on language??

Or is it bacause of When that particular PO was created...logon language was TR(Turkish) and hence the Table STXH has 'T' in TDSPRAS field??

Pls help...