Natasha 
🇪🇺How far back in time can you understand English?
It’s a thousand years of the English language, compressed into a single blog post.
"... as his post goes on, his language gets older. A hundred years older with each jump. The spelling changes. The grammar changes. Words you know are replaced by unfamiliar words, and his attitude gets older too, as the blogger’s voice is replaced by that of a Georgian diarist, an Elizabethan pamphleteer, a medieval chronicler."
https://www.deadlanguagesociety.com/p/how-far-back-in-time-understand-english
