Which plaintext languages to try?

[oshfdk]

I'm not sure what strategy would a medieval Czech person use to encode Czech letters like č, ž, š, é. Suppose we are not talking about the Voynich MS, but about a simple substitution cipher similar to Milanese diplomatic ciphers. Would there likely be separate codes for c, č, s, š? Or just a separate code for ˇ? What about vowels, would it make sense to differentiate between é and e in the cipher table?

Are there any known examples of medieval Czech ciphertexts?

I have no evidence pointing to Czech in particular, I'm just working on a multilingual pipeline that could simplify the last steps of testing a possible encoding scheme: finding a mapping of the resulting tokens to possible plaintexts in a list of known languages.

Edit: reading from Wikipedia, You are not allowed to view links. Register or Login to view. maybe it's even more likely digraphic spelling was used at the time the Voynich MS was likely created?

Various digraphs were used for non-Latin sounds. The system was not consistent and it also did not distinguish long and short vowels. It had some features that Polish orthography has kept, such as cz, rz instead of č, ř, but was still crippled by ambiguities, such as spelling both s and š as s/ss, z and ž as z, and sometimes even c and č both as cz, only distinguishing by context. Long vowels such as á were sometimes (but not always) written double as aa. Other features of the day included spelling j as g and v as w, as the early modern Latin alphabet had not by then distinguished j from i or v from u.