Okay, so imagine you love to play with toys and you have a group of friends who also love to play with toys. You all speak the same language and can easily communicate with each other about which toys you like and how to play with them.
Now, let's say you meet a new friend who also loves to play with toys, but they speak a language that nobody in your group knows. This means you can't easily communicate with them about toys or anything else.
Just like how that new friend's language is isolated from yours and your friends', there are some languages in the world that don't have any other languages like them. These are called language isolates. It's kind of like they're the only toy that nobody else in your toy group has ever seen before.
Some examples of language isolates are Basque (spoken in a region of Spain and France), Ainu (spoken in Japan), and Burushaski (spoken in Pakistan). These languages are special because they don't have any close relatives or other similar languages, making them unique and sometimes difficult to learn or study.