I am a native English speaker and in high school, I volunteered as a teaching assistant in the class for students learning English as a foreign language. There were times when the teacher was explaining some grammar rule, and I was like, "what?? really??" It was new to me too!
Also what even is English spelling? I took a course on the history of the Spanish language once, and this one guy wrote (in Spanish of course) something like: "It's very important that we make Spanish a logical language and make the alphabet/spelling match pronunciation, or we're going to end up like English or French." XD
Oh, and also as an American, I spelled "color" with the British spelling (colour) for a while when I was a kid, because I saw it spelled in a book that way.