How to translate heading for new_internal_link_admin

Hello SAP experts

I would like to change the danish translation of the heading you see if you try to create an internal link through the UICommand "new_internal_link_admin". You can find this UICommand in Content Management > User Interface > Commands > UI Commands with Selection and you can see it in action if you go to Content Administration > KM Content and click "Folder > New > Link...". Here you see the heading "New Internal Link", and the question is how I can change this text?

I have ten points ready for the one who can help me solve this troublesome issue.

Kind regards,

Martin