Rangpuri language is a way that some people talk to each other. It's like a secret code, but not really a secret. It's called Rangpuri because it's used a lot by people who come from a place called Rangpur in Bangladesh. They speak it in other parts of Bangladesh too, and also in some places in India.
Rangpuri is a different way of talking than the way other people around them talk. It has different words, sounds, and grammar rules. Even though Rangpuri is different than other languages, it's still a way for people to communicate with each other and share their ideas.
People learn Rangpuri mostly from their families, friends, and communities, since it's not really taught in schools. Some people also learn it as a way to connect with their heritage and cultural identity.
Like any language, Rangpuri helps people express themselves and share their stories. It's an important part of the culture and history of the people who speak it.