It's a good thing we speak English. We hear it is VERY hard to learn for people who did not grow up with it.
And that's partly because it's such a mish-mosh of parts of earlier languages (and some living ones).
And we make it harder on ourselves with the way we use it, as Ammon Shea demonstrates in Bad English: A History of Linguistic Aggravation.
The author joins us with details of his findings.