Some are in German, some are in English. But it's a local event, so primary use of the local language is snobbish? Because your ability to understand something matters more than having interesting content for the visitors? Isn't that very snobbish from you?

In the fahrplan for day 1, I count 21 English talks out of 36 total.

Because English is the only language of merit? And doing everything in only English isn't snobbish?