There may not be a big enough corpus for adequate training. The problem with both is that the main people writing would either prefer Latin (or later, French). The number of people who could write and used the vernacular to do so, were small.
Point taken. Altho I'm sure an AI could take a stab at building a corpus. Accuracy maybe better than 90% ?
I do not think I have seen a better example of a post being so drunk on the LLM kool-aid.
I'm not saying it would be accurate.
Most LLMs do well at Middle English (it is not that difficult of a task). Old English is significantly harder but I have found Claude Opus to give good results.