Many examples in the link are pronunciations, but there also some usage. Crawfish? Crayfish? Crawdad?
I grew up in the Midwest, and I remember among kids, every carbonated beverage was a Coke. What kind of Coke do you want? A Sprite. Then we realized it’s better to call it pop. Now that I moved to the South, I ask for pop any time I feel like being ridiculed. Any soda in the fridge?