Why Do People Around the World Say 'Hello'?

People say 'hello' to greet each other. It’s like a friendly wave when you meet someone. Just like kids say 'hi' at the playground, people from different places have their own special words for saying hello, like 'bonjour' in France and 'konnichiwa' in Japan. These words help people know they are talking to each other, even if they don’t understand every word.