Please write the session description in English when you submit your session. Also for the sessions that will be in Dutch.

We promised to have almost all sessions in English. We *will* have visitors that are not fluent in Dutch.

Show respect and give everybody the chance to understand what the sessions are about.

Also, please consider holding the talk in English so the non-Dutch speaking participants can attend. If during the session you find out that all attendants speak Dutch you can still switch during the session. I added the option "To be decided" in the languagefield.