A substantial body of Sindhi literature developed during the Medieval period, the most famous of which is the religious and mystic poetry of Shah Abdul Latif Bhittai from the 18th century. Sindhi was one of the first Indo-Aryan languages to encounter influence from Persian and Arabic following the Umayyad conquest in 712 CE. Sindhi has an attested history from the 10th century CE. In India, both the Perso-Arabic script and Devanagari are used. The main writing system is the Perso-Arabic script, which accounts for the majority of the Sindhi literature and is the only one currently used in Pakistan. It is also spoken by a further 1.7 million people in India, where it is a scheduled language, without any state-level official status. Sindhi ( / ˈ s ɪ n d i/ Sindhi: سِنڌِي ( Perso-Arabic), सिन्ध ( Devanagari) ) is an Indo-Aryan language spoken by about 30 million people in the Pakistani province of Sindh, where it has official status. Without proper rendering support, you may see unjoined letters or other symbols instead of Sindhi script. This article contains Sindhi text, written from right to left with some letters joined.