After I took my first few semesters of German, I came to assume that prepositions at the end of sentences was something borrowed from that root. But that isn't the kind of thing I'm talking about. I think Jackie's closer to what I was talking about. There are people in my family who talk just like that woman - and it's fine when you're talking to your own family or other people who understand you.

The problem is that language like this is often either imprecise or incorrect. It's fine for some uses and utterly inadequate for others. Imprecision may not matter in every case. But precision needs to be sufficient for the circumstance.