When I got my i3 a few weeks back, the uk "connected drive" site wasn't accepting registrations.
In order to get remote access I configured my car against the german site. Worked a treat for remote lock/unlock/preconditioning/range etc.. and whilst over half of the connected drive menus were in english, some of the lesser (?) used ones were in german! email for example
Once the UK site came back I deregistered from germany, and registered there. After a short while (10-20 mins?) my menus in the car were all back in English......
May help!
Nigel.