Well, I did consider this for a moment, but the Polish method is
called 'polish-slash' and assumes slash as the prefix character. But
in the Kashubian script there are sometimes multiple diacritic
variations of the same Latin letter, e.g. 'é' and 'ë'. Combined with
normal Polish 'ę' (absent in Kashubian) this is beginning to get
messy. But perhaps I could create something called 'polish-prefix'
which would serve as a union of scripts, i.e. combining ordinary
Polish diacritics with regional ones. What do you think?
Wojtek