Indo-Hittite is a big word that talks about languages that some people spoke a really long time ago.
A long time ago, there were a lot of different groups of people who spoke different languages. Some people spoke a language called Indo-European, and some people spoke a language called Hittite.
But then something cool happened! The Indo-European people and the Hittite people started to live close to each other and talk to each other. They started to mix their languages and make new ones. And that's how we got Indo-Hittite languages!
Indo-Hittite languages aren't spoken anymore, but we can still learn about them by looking at old writings and studying how they influenced other languages. It's like a really cool puzzle that helps us understand more about the world and where we come from.