We aim to interpret live 100% of the talks in German (* we do not always interpret things that aren't strictly speaking talks, like poetry readings or performance art, although we try to make these as accessible as we can). We also interpret various talks into other languages - we have a sizeable team working on French and Spanish interpretation, and depending on volunteer availability, we are keen to be target any spoken language. For this talk you are interested in, I'm very confident it will be interpreted into English.
You can find our work on media.ccc.de both on the streams and recorded talks. If you're attending live we have lower latency audio streams available on-site, check out c3lingo.org.