Comment by iLemming

It could be also because, we foreigners learn to write English prose through our reading comprehension, not via our listening circuitry. The text probably feels "normal" to me when I read it back to myself, but there's no "proper" feedback loop from the native speakers - I have zero idea how my written shit sounds to a native ear when they try to read it. I still do agree though, it feels so friggin' annoying these days to have to deliberately butcher some words and make sure there's a typo somehwere in your text, just to convince people that tis indeed a crap straight from my "head to the paper", not a slop.