Why and how the text could be Bavarian

[JoJo_Jost]

Unfortunately, handwriting and dialect are problems for us, but not for the "recipient".
And at what point does the cipher become more complicated (the same consonant lists)? Is this observed in VMS?

But this is also true for the recipient, because with this VBM, even slight changes in spelling conventions can disrupt the flow.

It gets more complicated because of compression. The edy family and the other families are compressions of spelling conventions. Thus, nasal sounds and spellings can be—and likely are—combined. So probably n nn and m mm. Or the p and b are treated as a single consonant because they were “interchangeable” at the time. The v and w—the same goes for t and dt.

The consonants groups: “s,” “z,” “ss,” “sz,” “cz”—all are apparently used “indiscriminately,” and to make things really complicated, so are “ts,” “z,” “cz,” and “tz.” Also “k,” “c,” “ck,”. The final sounds: “t,” “d,” “dt” in the same text. 

And of course there are also problems with the vowels. The “j” and “y” are often written as an “i,” the “u” as “v,” (and the "f" as "v"

And it’s not just consonants that are like this. In Bavarian, the “a” and “o” are sometimes indistinguishable. The “uo,” “ue,” “u,” etc., and so on.

On top of that, there are oddities like: “und” (and)
This is written as: und, vng, unde, vnde, vnnd, vnn, vn, vndd, vndt, unnd, unn, vnnde, un, and others.
Sometimes a writer even uses multiple versions in a single text.

This doesn’t make things any easier—it makes them extremely complicated. Especially with a cipher based on the flow of vowels and consonants.

So why do I consider a cipher of this kind to be weak? Because the “inventor” probably didn’t think that through, but maybe it was also only intended for a very small circle of persons... who knows.