Great !
If you look in $pwr_exe/en_us you'll find the files xtt_lng.dat, license.txt, and acceptlicense.txt. Create the directory $pwr_exe/da_dk and the put corresponding translated files in this directory. This will translate all texts in menues, object graphs and standard alarmtext in the operator environment.
Check out the translation by starting rt_xtt with the option -l da_dk
>rt_xtt -l da_dk
If you also want to translate Operator's Guide, place a translated version of $pwr_exe/en_us/man_opg.dat on $pwr_exe/da_dk. This translation you can check with co_help
>co_help -s $pwr_exe/da_dk/man_opg.dat
Read more about the files here.
http://www.proview.se/index.php?option=com_content&task=view&id=41&Itemid=75
/Claes