I'm interested how dialect is written in older text of revived languages, and then how it re-interpreted in modern day context. I'm struggling to find a way to explain this phenomenon without bending the meaning of existing linguistic terms...!
Dialect is definitely not only spoken. (Accent, on the other hand, generally refers to spoken things.) Different dialects can also have different written forms (as lexical items and syntactic structures are also features of dialects).
Thank you Stephen :) I've attempted to ask questions before on this and was always met with the reply that dialect can't be written, so happy to have all alternative suggests about explaining dialect in textual form.