[donjuancarlos]

A hackathon, startup conference, festival for crazy people.

[tribeofone]

Might be a stupid question but, I'm thinking of going, will the the talks be in English?

[adlpz]

Seems like you can guess by the titles of each session here: http://interactive-cologne.com/schedule/. If they are en German I'd assume the talk is in German, etc.