You can change the language for your Office 365 applications by following the steps below.
Start by signing in to office.zealand.dk.
I the upper right corner, click on the round icon with your initials.
Klik on "My Office-profile
Click on "Update profile"
Expand the field "How can I change language and regional settings?" and click on "here"
Click on the three dots (...) og select "Language and region"
Add the desired languages for both "My Display Language" and "My Content and Search Languages", and click "Save all, and close.
Click once more on "Update profile"
Once more expand the field "How can I change language and regional settings?" and click on "here"
Click on "Apps" i the left menu
Click on "Site settings"
Click on "Language settings"
Select the desired languages and click "OK" at the bottom of the page.
You can now switch between the added languages in office.zealand.dk, by clicking on the wheel i the upper panel and clicking on "View all" beneath the "Language" field.