When a participant is not available for a date it says "gebucht" this has been misunderstood as the person is booked for my event. Instead it would be a better translation to put "nicht verfügbar".
Steps to reproduce:
# Create event
# Add participants that do not have time
# Hover over the red box
Actual result: The person is shown red and if hovering it says "gebucht"
Expected result: Maybe the word "nicht verfügbar" would be better to understand.