The Sindhi parlance has witnessed a transition over the years and there are varying theories related to the ancestry of the language. Historians working hard to fathom the origin of the language have varying conclusions to offer.

Facts and discoveries of Sindhi parlances over the years have launched a debate about the Sindhi language being a derivative of the ancient Sanskrit dialect and there a few historians who believe that it's the other way round. Dr Ernest Trumpp was the pioneer of the theory that Sindhi is a derivative of Sanskrit language. Judging from its vocabulary and roots of verbs, Dr Trumpp came to the conclusion that "Sindhi is a pure Sanskritical language". Hindu scholars Dr. H M Gurbaxani and Berumal Maharchand Advani agreed with the concept. But Miss Popati Hiranandani in her book 'Sindhis: The scattered treasure' (pg6) has an interesting deliberation to this theory. According to her some scholars confused the words prakrita (meaning=natural) with the word purakrita (meaning - formed first), which misled them. In the same way, she says, due to affinity towards Hinduism, litterateurs like Kishinchand Jetley translated a couplet from Sindhi poet Shah Abdul Latif's poetry into Sanskrit and concluded that the similarity shows the derivation of Sindhi from Sanskrit. She rightly argues that it could be the other way round too and cites two authorities to elucidate this point. One is Siraj-ul-Haq of Pakistan who states:

"The history of Sindhi is older than that of Sanskrit and its related civilization or culture are derived from the civilization or culture of Sindh and from Sindhi language…Sanskrit is born of Sindhi - if not directly, at least indirectly."

The other is an Indian linguist, S Kandappan who says:

"Sindhi is one of the ancient languages. I say it is the most ancient languages, I know it has got its origin even before Sanskrit in the country…."

Interestingly, after further studies Dr Trumpp himself seemed to be doubtful about his findings. Testimonies to this are the remarks in one of his work of arts:

"Sindhi has remained steady in the first stage of decomposition after the old Prakrit, where all other cognate dialects have sunk some degrees deeper and we shall see in the course of our introductory remarks that rule, which the Prakrit grammarian, Kramdishvara has laid down in reference to the Apabramsha, are still recognizable in present day Sindhi, which by no means can be stated of the other dialects. The Sindhi has thus become an independent language, which, though sharing a common origin with its sister tongues, is very materially different from them."

Dr Trumpp's initial theory was first challenged by Dr. Nabibux Baloch. He believes that Sindhi belongs to the Semitic group. Mr. Ali Nawaz Jatoi holds the same view. They point out that there are some words in Sindhi that cannot be found in Sanskrit. Besides, the suffixes added to the pronouns in Sindhi suggest its relation with Semitic languages. The word 'Sanskrit' itself denotes that it is a polished or refined form of a language that was already prevalent. The grammarians Patanjali and Panini formed rules and regulations, which came to be necessarily, and compulsorily followed by writers and poets of those days. Thus, Sanskrit was only the language of literature as is evident from works of classical writers. Dr Baloch states:

"Sindhi is an ancient Indo-Aryan language, probably having its origin in a pre-Sanskrit Indo-Aryan Indus Valley language. The Lahnda and Kashmiri appear to be its cognate sisters with a common Dardic element in them all."

Sir George Grierson too places Sindhi as a near relative of the Dardic languages. (Dardistan is a region near Kashmir).

The origin of Sindhi language had been an unfathomable mystery inundated by the contrasting views of historians, scholars and archeologists who made their assumptions based on the civilization existent in the ancient Sindh, yet another research came to the fore. According to Sir John Marshall the earliest Indian civilization was that of the Indus Valley and not that of the Aryans. And both the races were unrelated and had an independent origin and development. Dr Mackay had also said, "The seals found in Mohenjo-Daro are the only known inscriptions of the Indus Valley which can give some idea of the people. They certainly had a language of their own."

The excavations of Mohenjo-Daro have opened new vistas for the study of the origin of Sindhi language. It has been agreed by many a scholars, archeologists and historians that the Indus Valley was occupied by a Non-Aryan (Dravidian) people before the Aryan settlement in the Indus Valley. They had a very rich culture and a language of their own. Return of the Aryans by Bhagwan S Gidwani also clarifies this fact. According to Bhagwan Gidwani:

"Sind, along with Bharat Varsha in its entirety, is the most ancient civilization in the world - more ancient than China, Japan, Mesopotamia, Iran and Egypt. He also categorically states that Sind and Bharat Varsha, were there before Rome was built, and before Jerusalem, Carthage, Greece, Damascus and Istanbul were founded. When Europeans lived in caves, our people along Sindhu river had two-storey houses built of brick and stone, with drainage system, public parks, public baths, art-works, fountains and granaries."

Excerpts from an article by Ram Jethmalani that appeared in The Indian Express of Sunday Feb 26, 1995 had some noteworthy insights. He wrote:

'John Marshal and his Indian collaborators made us feel proud that when letters and arts were still unknown to the city of Athens and when scarcely a thatched hut stood on what afterwards became the site of Rome, India could boast of a breathtakingly advanced civilization. Let Sir John speak for himself: "These discoveries established the existence in Sind (the northernmost province of Bombay Presidency) and the Punjab, during the fourth and third millennium B.C. of a highly developed city life …'

Scandinavian scholars were the ones who later initiated the study of deciphering the ancient script of the Indus civilization. Their reports greatly helped the scholars of linguistics in studying the structure of Sindhi language. Their reports also assisted scholars in establishing that Sindhi is a non-Aryan or pre-Aryan language having its roots in the civilization of Mohenjo-Daro, and is related to the Dravidian languages. The Scandinavian scholars after translating the script of Mohenjo-Daro seals, concluded that Sindhi is a proto-Dravidian language and stated:

"The language (that of Mohenjo-Daro) is an early form of Dravidian, called by us 'Proto-Dravidian'. It appears to be very close to the South-Dravidian, especially Tamil, and decidedly younger than the parent language of al Dravidian tongues."

Mr Sirajul Haque also complements this view. According to him:

"Sindhi is one of the Dravidian languages, and has its roots in the civilization of Mohenjo-Daro."

After deep study of Sindhi phonetics, phonology, morphology and syntax, the peculiarities of non-Aryan origin have been observed in Sindhi, and these non-Aryan peculiarities are similar to those of Dravidian languages. It can, therefore, be said that Sindhi has retained the characteristics of indigenous tongue, which was in use in Sindh before Aryan settlements in the area.
The theory finds support in Dr Trumpp's book, 'A grammar of Sindhi Language', in which he wrote:

"We shall on the other hand be able to trace out a certain residuum of vocables, which we must allot to an aboriginal language, of which neither name nor extent is known to us. But which, in all probability was of the Tatar Stock of languages and spread throughout the length and breadth of India before the interruption of the Aryan race, as all other vernaculars contain a similar non-Aryan residuum of words, which have been already designated as 'Provincial' by the old Prakrit grammarians."

From comparative study of Sindhi and dialects of Dravidian languages, it has been found that phonetically, phonologically, morphologically and syntactically Sindhi and Dravidian languages are close to each other. This is, however, a subject still under research.