Comparative linguistics is like playing a game of spot the difference between different languages! Just like how you can spot differences between your friend's toys and your own toys, comparative linguistics helps us see how words and grammar structures are similar or different between different languages.
Imagine you are at a party with your friends, and you overhear two of your friends speaking a language that you don't understand. But because you know another language (like English), you may be able to hear a few words or phrases that sound similar to what you know. For example, you might hear a word that sounds like "hello", "thank you", or "goodbye". You might also notice that the people speaking are using similar grammar rules to the ones you use when you speak your own language.
In comparative linguistics, we do something similar but with many different languages at once. We look at languages that are related (like French and Spanish, which both come from Latin), and we compare their vocabulary and grammar to see how they are similar or different. We might also compare languages from different parts of the world to try to figure out how people might have moved and migrated throughout history.
Comparative linguistics can help us learn more about the history of different languages and cultures. It's like being a detective or a puzzle solver, trying to put together the different pieces of a language to see where it fits in the bigger picture.