some days ago, I posted an issue here for OneNote Online regarding the task pane when adding a meeting. Today, I noticed another issue after a successful login in the corresponding task pane. This issue seems to be new for me - hopefully to have not overseen something.
For reproducing, open One Note Online for a user using One Note in German and add the meeting details from Start / Besprechungsdetails. Login to your Office 365 account from the task pane. Then, your meetings are shown there.
The word Refresh is untranslated in this view and should be e.g. Aktualisieren.