According to scientific evidence, the first humans to invent language were Indians, rest of the uncivilized humans just copied them.
The scientific evidence is :
The Languages of India
The Languages of India belong to several language families, the major ones being the Indo-Aryan languages (a subbranch of Indo-European) spoken by 74% of Indians and the Dravidian languages spoken by 23% of Indians.[1][2] Other languages spoken in India belong to the Austroasiatic, Tibeto-Burman, and a few minor language families and isolates.[3]
India has no offical national language [4] . The official language of the Union Government of Republic of India is Standard Hindi, while English is the secondary official language.[5] The constitution of India states that "The official language of the Union shall be Hindi in Devanagari script."[6] a position supported by a High Court ruling.[7] However, languages listed in the Eighth Schedule of the Indian constitution are sometimes referred to, without legal standing, as the national languages of India.[8][9]
Individual mother tongues in India number several hundred;[10] the 1961 census recognized 1,652[11] (SIL Ethnologue lists 415). According to Census of India of 2001, 30 languages are spoken b more than a million native speakers, 122 by more than 10,000. More than three millennia of language contact has led to significant mutual influence among the four language families in India and South Asia. Two contact languages have played an important role in the history of India: Persian and English.[12]
History
The northern Indian languages from the Indo-Iranian branch of the Indo-European family evolved from Old Indo-Aryan by way of the Middle Indo-Aryan Prakrit languages and Apabhraṃśa of the Middle Ages. There is no consensus for a specific time where the modern north Indian languages such as Hindustani, Assamese, Bengali, Gujarati, Marathi, Punjabi, Rajasthani, Sindhi and Oriya emerged, but AD 1000 is commonly accepted.[13] Each language had different influences, with Hindustani being strongly influenced by Persian.
The Dravidian languages of South India had a history independent of Sanskrit. The major Dravidian languages are Tamil, Telugu, Malayalam, Kannada and Tulu.[14] Though Malayalam and Telugu are Dravidian in origin, over eighty percent of their lexicon is borrowed from Sanskrit.[15][16][17][18] The Telugu script can reproduce the full range of Sanskrit phonetics without losing any of the text's originality,[19] whereas the Malayalam script includes graphemes capable of representing all the sounds of Sanskrit and all Dravidian languages.[20][21] The Kannada language has lesser Sanskrit and Prakrit influence and the Tamil language the least.[citation needed] The Austroasiatic and Tibeto-Burman languages of North-East India also have long independent histories.
https://en.wikipedia.org/wiki/Languages_of_India
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Origin of language
The origin of language in the human species has been the topic of scholarly discussions for several centuries. In spite of this, there is no consensus on its ultimate origin or age. One problem that makes the topic difficult to study is the lack of direct evidence. Consequently, scholars wishing to study the origins of language must draw inferences from other kinds of evidence such as the fossil record or from archaeological evidence, from contemporary language diversity, from studies of language acquisition, and from comparisons between human language and systems of communication existing among other animals, particularly other primates. It is generally agreed that the origins of language are closely tied to the origins of modern human behavior, but there is little agreement about the implications and directionality of this connection.
This shortage of empirical evidence has led many scholars to regard the entire topic as unsuitable for serious study. In 1866, the Linguistic Society of Paris went so far as to ban debates on the subject, a prohibition which remained influential across much of the western world until late in the twentieth century.[1] Today, there are numerous hypotheses about how, why, when, and where language might first have emerged.[2] It might seem that there is hardly more agreement today than there was a hundred years ago, when Charles Darwin's theory of evolution by natural selection provoked a rash of armchair speculations on the topic.[3] Since the early 1990s, however, a growing number of professional linguists, archaeologists, psychologists, anthropologists, and others have attempted to address with new methods what they are beginning to consider "the hardest problem in science".[4]
http://en.wikipedia.org/wiki/Origin_of_language