Yeah, that seems like an important distinction
replyIt looks like ROT13 text to me, I hope it's not Welsh. Don't want to offend anyone if that's their actual language :)
replyIt's actually Welsh, and the funny thing is that one of the sentences in the example "gibberish" text (although with some further OCR errors) means:
reply"It will be easy for the knowledgeable to fix the few errors that remain [in the text]". (Bydd yn rwydd iawn i'r cyfarwydd ddiwygio'r ychydig.")
Which is exactly what the OP is doing.