“Pivo” means “beer” in Czech. The meetups are quite informal, and they're held in pubs. First there are some talks and presentations, then we mingle.
Meetups are in Czech language by default, because most of Czechs are still uncomfortable to speak in English publicly. It's OK for you to speak and present in English, though: most people understand. Many people will be also very happy to have English discussions over a beer with you.
Every event usually selects a topic in advance and people volunteer to give talks on that topic.
It's encouraged to come to Pyvo and give a lightning talk – a five-minute presentation about anything at all – after the “main” talks.
Usually, you can have dinner at the meetup. Not only does this stop hunger, it also supports the restaurant that hosts the meetup.
If you'd like to speak, now or in the future, for 10 minutes or an hour, on-topic or off, get in touch with the organizers! Look for contact information on the pages of individual Pyvos: Praha, Brno, Ostrava.
Almost all programmers understand English, and most can even speak it. If you can read this text, language shouldn't be a problem!
A normal talk should be up to twenty minutes. We get together after work for a couple of beers; we want to hear a bit of interesting stuff rather than all the details.
We usually record talks, and put videos online. If you don't want a recording, let the camera operator know.