We have featured linguist extraordinaire John McWhorter here before. We would cite him more, but linguistics, including but not limited to grammar, is not our bag. Lexicide dishes on poor word usage, not bad spelling or conjugations.
But this article, offered up by pastor and good doctor of letters Jim, kinda sorta covers all three:
In countries where English isn’t spoken, there is no such thing as a ‘spelling bee’ competition. For a normal language, spelling at least pretends a basic correspondence to the way people pronounce the words. But English is not normal….
There is exactly one language on Earth whose present tense requires a special ending only in the third‑person singular. I’m writing in it….
Which leads Dr. McWhorter to ask:
Why is our language so eccentric? Just what is this thing we’re speaking, and what happened to make it this way?
He then proceeds on a tiny history lesson, touching on loanwords and couplets, which Lexicide also covered. It’s a great read, whether you love English or loathe it.