one of my favourite of these was a well known film critic who admitted that well into adulthood he thought the expression for how far away something was in a straight line was "as the crowth lies" instead of "as the crow flies" without ever thinking "what is a crowth?"
Everyday vs every day It's vs its. It's shocking how many people get that one wrong, but it can be tricky in some situations. Nothing vs anything. Into vs in to. Maybe vs may be.
We should access and evaluate to situation (meaning the person pronounces it as assess, writes it as access). If they say well, we need permission and we have to get in to evaluate, they're full of shit.