Notion of language

Language is a set of symbols and rules used to convey information, a system of conventional spoken or written symbols used by people in a shared culture to communicate with each other. A language both reflects and affects a culture's way of thinking, and changes in a culture influence the development of its language. Related languages become more differentiated when their speakers are isolated from each other. When speech communities come into contact (e.g., through trade or conquest), their languages influence each other. Most existing languages are grouped with other languages descended "genetically" from a common ancestral language. The broadest grouping of languages is the language family. For example, all the Romance languages are derived from Latin, which in turn belongs to the Italic branch of the Indo-European language family, descended from the ancient parent language, Proto-Indo-European. Relationships between languages are traced by comparing grammar and syntax and especially by looking for cognates (related words) in different languages. Language has a complex structure that can be analyzed and systematically presented. All languages begin as speech, and many go on to develop writing systems. All can employ different sentence structures to convey mood. They use their resources differently for this but seem to be equally flexible structurally. The principal resources are word order, word form, syntactic structure, and, in speech, intonation. Different languages keep indicators of number, person, gender, tense, mood, and other categories separate from the root word or attach them to it. The innate human capacity to learn language fades with age, and languages learned after about age 10 are usually not spoken as well as those learned earlier.

Evolution of Language

There is now more scholarly interest in the origin of language man at any time since the eighteenth century, although among linguists, anatomists, and anthropologists no consensus has emerged as to its timing and nature. When over the course of the nineteenth century no evidence of any 'primitive' languages was found, discussion of origins was for a long time officially proscribed. One current view has it that an explosion of cave art and symbolic behaviour some 40 000 years ago coincided with the abrupt extinction of Neanderthals, and was causally related to the emergence of language. But this is probably based on an illusion of synchronicity. The adaptation of the vocal tract for speech production — in particular the lowering of the larynx — seems to have been complete at least 125 000, and perhaps 200 000 years ago. This would seem to support a much earlier origin for language; some form of proto-language may well have been present in the earliest hominids.

The question — which exercised Charles Darwin — as to whether there is evolutionary continuity between animal signalling systems and human language, has prompted, over the last thirty years, a number of widely publicized experiments involving attempts to teach human language to apes. Some of the early efforts foundered on the fact that other primates do not have the anatomy necessary for human speech production; later attempts using sign language seemed to fare better. The enduring ambiguity of the results lies not only in the slippage around definitions of language, but also in the tendency of primatologists, as linguistic creatures, to impute sense to their subjects, and to project the human world onto the realm of nature. The assumption of cross-species continuities and homologies with respect to language, implicit in the methods of ethologists and behaviourists working on very old associationist principles, was flatly rejected in a notorious 1959 polemic by the linguist Noam Chomsky, who argued that human language was based on entirely different principles from animal communication. Some detected, in this unqualified assertion of the absolute uniqueness of the human language faculty, an echo of the Victorian geologist Charles Lyell's remark, when he told Darwin that, despite being a supporter, he was unable 'to go the whole orang'.

It has often been claimed that in gesture lies the origin of language, but, if so, speech very early achieved primacy, perhaps because a vocal-auditory system had crucial advantages: no mutual visibility was necessary between speaker and audience, the mouth was otherwise unoccupied except when eating, and the hands were freed for other employment. The language faculty co-opted brain and body structures (mouth, ear) that had been developed for other functions (breathing, eating, balance). Spoken language makes use of sound carried on out-breathed air from the lungs, which is modulated by articulators (tongue, lips, etc.) to produce the vocal repertoire of a natural language. No single language uses anything like the full range of sounds of which humans are capable, and certain classes of sound — for example, clicks and implosives, where the airstream is reversed and moves inwards — are rare in the world's languages.