Alright, so imagine you're on a big island in the middle of the ocean. Now, there are people who live on that island, and they've been living there for a long, long time. They are called "isleños".
Isleños are a special kind of people because they have their own culture and traditions that are different from other people who live in other parts of the world. They have their own language, music, and even food.
In fact, isleños are so special that they have their own special day called "Isleño Day", where they celebrate their culture and history.
So, to put it simply, isleños are people who live on an island and have their own unique culture and traditions. They are kind of like a big family with their own special way of doing things.