What is the preferred language of the session? Is the choice free or does everything have to be in English due to the international audience?

The preferred language is English. 

Keynotes, Presentations, Fireside Chats and Panels are permitted in English only.

Masterclasses, Deep Dives, Lectures, Start-up Pitches and Summits can be held in English as well as in German.

200.gif?cid=6104955e17oprpwwmyd3uvenb44kylh458m7vdvugdu5mcmq&rid=200.gif&ct=g