You would think that, but I've seen Germans with a PhD that don't speak English. Once a language is large enough, most things get translated into that language (as there is a market for it). Anyway, German and French are large enough, Dutch isn't.
And while you are at it, why not read the material in English in the first place? That way you are using the correct terminology.
My mother tongue is Dutch, and all my systems run in English. The silly words people come up with translating things to their own language is weird and confusing. I remember Excel having Dutch translations for their functions. WTF!?!?! Try to guess the Dutch version of things you already know.
You are working in the technology industry, learn English! (not directed at the above poster :))
What about the tools that they use? do you get german translations for all those popular python-libraries?
How do you handle scientific papers? are those also translated, or do you only look at german research at german univiersities?
I would think that it would be pretty non-controversial to say that english is the lingua-franca of science today.
With that said, I could argue against myself in saying that it's nice of elementsofai to use as many languages as possible since this might be of use to people who are still far from university-level.
As someone that graduated during the 90's, and had graphics programming as one of my main focus, there were plenty of German only papers out of Darmstadt.
We had a couple of proceedings books with them on our university library.