Brand language is like the words and phrases your favorite cartoons or toys use to talk to you. Just like how they have their own way of speaking and unique phrases that you remember, companies also have their own language that they use to talk to you.
For example, have you ever noticed how McDonald's always says "I'm lovin' it"? Or how Nike tells you to "Just do it"? These are phrases that they use to make you remember their brand and connect with you emotionally.
Brand language also includes things like the tone of voice used in their ads or the words they use to describe their products. It's like the special language that a company uses to make you feel a certain way when you think about or use their products.
So just like how you have your own special way of speaking with your friends, companies have their own language that they use to talk to you and help you remember them.