Why and how the text could be Bavarian

[Grove]

Are benched gallows cth ckh cph cfh and oddballs like cthh other etc… all rolled up to t and k?

In my mind there’s always been the possibility of a column row based table or set of tables hiding away either syllables or I suppose consonant clusters of 1-3 characters with a separate o table particularly designed for labels or numbers.

All that to say I like the idea of requiring two components working together to decipher a plaintext.