Is it feasible to attend the CCC as a non-German with only a basic grasp of the language? I've always had the impression that it was very German-language oriented, but seeing the amount of English in this thread has me reconsidering.
Also the price (iirc 100 EUR for a standard 4-day ticket last time) is ridiculously low given the massive amount of talks, often very high-caliber, and very varied. Check out last year's schedule to get an idea: https://fahrplan.events.ccc.de/congress/2016/Fahrplan/schedu...
And there's so much more besides the talks! They typically open the venue the evening before (26th), and then it goes on 24/7 non-stop until the 30th. Go if you can. I've persuaded various people to come over the years - techies and non-techies alike - and everyone's had a blast.
I would guess that almost everybody of the participants can speak English, although a considerable amount of them will be Germans.