The English Language

This year, being in Kindergarten, Jaxon is learning to read, write, and spell. He's really having fun doing it, and often has a pen and paper writing words, etc. So he's really having fun spelling, and one day he's spelling words and he's really proud of himself. "Mom, I can spell, he says. Apple, a-p-l. Lamb, l-a-m. I thought, well, that's how they sound. I didn't have the heart to tell him that apple has two p's, and an e on the end. Or that lamb has a b on the end of it. How do you even explain that to him?? And then I'm thinking, "who made up this English language???" It really makes no sense, or does it and I've just forgotten all the rules?? I've never learned another language to any degree that I can actually speak it, but are they as complicated as ours?? Do they have a bunch of silent letters in them that confuse kindergartners?