The Spoken Word challenges you on language.
People in England during the Middle Ages spoke what is known as (unsurprisingly) Middle English. It had developed from Old English (which closely resembled German) with the addition of French words brought in by the Norman invaders. By Richard III's time the language resembled Modern English much more than it did Old English and it is (mostly) understandable today.
The letter 'A' was pronounced as in 'Father,'
The letter 'E' as in 'Fete,'
The letter 'I' as in 'Receipt,'
The letter 'O' as in 'To,'
And the letter 'U' as in 'Doubt.'
This accounts for much of the difference in spelling from Modern English. The word 'blood' was mostly spelt 'blud' and pronounced 'blowd'