 In 2003, along with some 62 other indigenous languages, it was recognised by a statutory law of Mexico (General Law of Linguistic Rights of the Indigenous Peoples) as an official language in the Federal District and the other administrative divisions in which it is spoken, and on an equal footing with Spanish.The largest concentration of Mazahua is found in the municipality of San Felipe del Progreso, State of México, near Toluca.The closest relatives of the Mazahua language are Otomi, Matlatzinca, and Ocuilteco/Tlahuica languages, which together with Mazahua form the Otomian subgroup of the Oto-Pamean branch of the Oto-Manguean language family.