I know someone who habitually replaces the word "so" with the word "for." For example, "I'm going to the supermarket for I can get some chicken," or, "I take blood pressure pills for my blood pressure won't be high."
I've always found this odd, but they claim this is common in their region (New Jersey). I've never heard anyone else from the region speak this way.
Does anyone know if this really is a regional thing, or could it be specific to this individual?
ETA - Because several people have brought it up, I'd like to add that not only is English this person's first language, it's her only language. She doesn't speak any other languages at all, and the same goes for the rest of her family.
I've also spoken to one or two other people who live in the same area (as in, the same neighborhood) as this person, and they all say that they've never heard this usage from anyone else in the area.