Frenchelon is a program run by the French government. Just like when you play hide and seek, the government wants to know where things are and what people are doing. So, they use special machines and tools to listen and see things that are happening in the world. For example, they might listen in on phone calls or read emails that people send. They do this to make sure that everything is okay and to keep people safe. However, some people think that this is not right because it's like spying on people. So, it's a bit like a game of hide and seek, but the government is using special tools to find people instead of just looking for them with their eyes.