Smartform: Printing date in foreign language

There is a smartform with default language DE and it's translated to hungarian.

I had to make some changes in the form and I also had to add a new date field into the form, but it's always printed in the german date format DD.MM.YYYY, and not in the hungarian date format YYYY.MM.DD.

Moreover other dates in the form are displayed now in the german format and not in the hungarian, but it was good before I did the changes.

Other strange thing is that in the development system everything is fine and every dates are in the hungarian format, but in the test system every dates are in the wrong format.

Why can it happen and how can I fix it?

I tried GET LOCALE - SET LOCALE but it did not fix it. I tried something in SE63 but I also could not fix it. Please help.

Thank in advance,

Peter