You will notice how often people say "yuh" after you read this blog today. How do I know you'll notice this? It's called the "Frequency Illusion" or the "Baader-Meinhof Phenomenon" which is really a "confirmation bias." Once you pay attention to this thing in your environment, you'll start noticing it everywhere. I count on this as part of my instruction for helping people make changes in their speech and you can, too. You have to feel comfortable to try something that's new to you and if you notice that that's how everyone else is really speaking and they won't notice if you speak that way, you should feel more confident to try it.