Why and how the text could be Bavarian

[magnesium]

Before attempting to decode it, I recommend building out a model of how this encoding of Middle High German/Bavarian behaves when it encrypts known Middle High German/Bavarian texts of various types. You can then compare the outputs of your notional cipher to Voynichese. That iterative approach would help test the idea and highlight especially large gaps between the two types of text.