My manager has a speech pattern that I've never heard anyone else use, and I was wondering if it was just her idiolect, or something common to where she grew up, or what. She very consistently adds an "s" to proper nouns. For example, she has said that her favorite food is "Raisin Brans", and consistently calls Wal-Mart "Wal-Marts" (actually, she says "Wal-Marks", but that's neither here nor there for what I'm curious about here). Is that a "thing" somewhere, or is it unique to her?