The term KIN OF HINDI is answered by the four letter word URDU. URDU is an Indo-Aryan language spoken mainly in Pakistan and India. It is the official language of Pakistan and is also widely spoken in India. URDU is closely related to Hindi and is mutually intelligible with it. It is written in a modified form of the Perso-Arabic script. URDU is the national language of Pakistan and is one of the 22 official languages of India.