Why and how the text could be Bavarian

[JoJo_Jost]

Here’s how it works: The double consonant (usually) appears after a short vowel. A good example: "Ratte" (rat)-short "a," but the "t" is pronounced like a single "t." If you drop one "t" you get "rate" (English: "guess"), which is a verb. In that case, it’s a long "a."

And that, of course, makes a difference.

But, to be clear: No cipher in the world would encode German double consonants; that would be the key to direct decryption. In a phonetic cipher, there wouldn’t even be a double "t"