Shakespeare used early modern English which I can hardly follow along. Middle English and Old English and unintelligible for the modern English speaker. English feels like JavaScript among human languages. I use English daily and feels like a defective language. The way Americans pronounce "Aluminium" is a simple example of it. The language itself feels like a slang made up by a group of teenagers while playing around.
You can contrast this with languages like Sanskrit which has been preserved for thousands of years. "Vedic Sanskrit" is the most sophisticated language I have ever come across. The only language that comes close in complexity is regular Sanskrit which can be treated as a simplified children's versions Indus Valley Seals have been deciphered to be mostly Sanskrit with few "Vedic Sanskrit" words.
You May Require Subtitles
I managed to understand parts of the speech without subtitles because I had already seen some videos on Gen Alpha slang. The rate of change in the English language has been large enough to a point it already is partially unintelligible for millennials. I don't see the same level of difficulty understanding elders who are 1 - 2 generations older nor do they have trouble understanding me.