Why and how the text could be Bavarian

[ololololo]

But every cipher must also have rules; that’s a circular argument that leads in the wrong direction, and by no means constitutes a counterargument. And so far, there are extremely few and general rules—far from covering every specific case with a new, specific rule. That’s the difference.

In general, given the results of your work and the conclusions you have reached so far, I can assume that the cipher was flexible, and the author did not follow any strict rules.