> Give me clean mono-language "source" code any day please.

Unfortunately, not many programming languages with German keywords exist. ;-)

No, as a German, I understand your concern. The problem is, you need to be fluent in the language AND use names that fit the variables. I work in High Performance Computing and the code physicists write isn't accessible to me most of the times, just because they use one and two letter variables from their formulas in their code.

Unfortunately you have to name your variables in the context of the domain language. The domain language is usually in your native language. The keywords are in English. It looks horrible but there is no way around it. And you lucky native English speakers have never experienced the horror that are umlauts in filenames across filesystems and encodings.

shudder that reminds me that you can't Control+F "üõöä" properly in Chromium, both "uooa" and "üõöä" are matched, that's for me far more infuriating that breaking filename encoding.