Sindhi is an Indo-Aryan language spoken by approximately 53 million people in Pakistan and India. It evolved over 2400 years from contact with Aryan and later incorporated vocabulary from Arabic, Persian, and Dravidian languages. There is debate around whether Sindhi originated from Sanskrit or is an ancient Indo-Aryan language. It can be written in several scripts including Devanagari, Arabic, and Khudabadi scripts. Sindhi also has various regional dialects distinguished by phonological, grammatical, and vocabulary differences.