Brighton voice refers to the way people from Brighton, a city in England, speak. Imagine you're playing with your dolls and one of them talks in a different way than the others. That's what a Brighton voice sounds like to someone who doesn't come from there.
People who have a Brighton voice pronounce words in a very specific way. For example, they might say "butter" like "buh-tuh", and "water" like "wah-tuh". They also add an "r" sound at the end of some words, like "idea-r" instead of "idea".
The Brighton accent can be hard to understand for people who aren't used to it, but it's just one of the many ways people talk in different parts of the world. It's important to be respectful and kind to people who speak in a different way than we do, and to remember that everyone is unique and special in their own way!