Hi Melanie
not really sure if your issue is specific to GRC or more webdynpro
Have you had a look at SAP Wiki/help information such as
Language Translation in ABAP Web Dynpro Application - Web Dynpro ABAP - SCN Wiki
If not, might be worth tagging to ABAP community
Regards
Colleen
P.s. - I thought the UAR form already had a Personnel Number field?