Simplify the following text for a Grade 13 native English-speaking person.
Original: The AsociaciÃ n Cultural de la Llingua LlÃ onesa El Fueyu ( Cultural Leonese Association of the Leonese Language El Fueyu ) is a Leonese language association whose main effort is promoting the knowledge of Leonese language and the defense of the rights of Leonese language speakers .
Simplified: The AsociaciÃ n Cultural de la Llingua LlÃ onesa El Fueyu ( Cultural Leonese Association of the Leonese Language El Fueyu ) is a Leonese language who wants to promote the knowledge of Leonese language and the defense of the rights of Leonese language speakers .