The English translation of the menu items and features include intra for parents (Forældre), staff (Personale/Lærer) and students (Elev).
How to do it
The option to switch languages exists only in the 'new' SkoleIntra – which means it is not SkoleIntra 'Classic'.
Click Indstillinger (Options) and then select the Sprog (Languages) tab - Choose 'English':
If you choose English ForældreIntra will now be ParentIntra: