Well, there is a language called Walloon that some people in Belgium speak. It's kind of like French because it comes from a similar place, but it has its own unique words and way of speaking.
Imagine that you and your friend both speak English, but your friend is from a different place and they sometimes use different words or say things in a different way than you do. That's kind of like how Walloon is compared to French.
Some people might think it's important to keep the Walloon language alive because it's a part of their culture and heritage. Others might speak it because it's just what they grew up with and it's what they know.
So, in short, Walloon is a language that some people in Belgium speak and it's similar to French but has its own unique words and way of speaking.