True but look at what he says about the German way of speaking German. How each region, even town has their way of saying things and so on. I won't quote chapter and verse but I was reading it the other night.
And it still happens today; I said something to a friend of mine at work years ago and she stopped dead in her tracks and said that no one had said that to her since she was five years old and only her uncle used that expression (luckily she wasn't blushing). And everywhere I'd been in Germany it was the standard greeting...
Also, some of my colleagues had fled from Germany in the 1930's and spoke a different version of the language to everyone else. And then there's Hamburg and Berlin...
The same things happen in most countries with extreme local variations in some cases. At work we always had problems with speaking to Marseille - especially if our people were born and bred in Paris, for example.
Going back to the code words; we need someone who speaks and understands the German spoken around Wetzlar in the 1920's to go through the list and comment on it. Then we might get somewhere.
There's a certain amount of logic to the list if you pick things at random, for example, the leather cases but it soon breaks down as you go through the list and see more and more exceptions. I'm using "Codewords Description and Index as at September 1938" by Hove - of course - but there's other lists in the catalogues of the 50's, 60's and so on. I've not got the full set for obvious reasons.
Regards, David
PS Having typed all that I remembered that I have a modern-ish Canon SLR called a Kiss something or the other in the collection. Would you expect those logical Japanese in the marketing dept to allow that? But then who would buy a camera sprayed pink? But they sell them...