Re: Standard German and Dialects?
That makes sense. A letter never encrypting as itself was one of the enigma device quirks exploited by the geniuses who cracked it.
Of course the heros of Bletchley Park are rightly lauded, but I don't think the Poles who got things rolling are given their due. Without mechanical aids, they replicated enigma's internal workings with string and paper tags. By the time they had a solution, a cat's cradle would fill the room. And they did this all while staying one step ahead of the Wehrmacht until they reached Britain.