Language is often described as the sine-qua-non or the most important and distinguishing characteristic of a culture or civilisation

Stated simply the question runs as follows:
Do sub-human organisms exhibit and employ a particular activity or activities seen at the human level, and if so how far down the levels of the evolution ladder this activity is seen?
Further, if these activities are found to be present at the lower levels do they serve the same purposes as they do at the human level? Do they show the same degree of complexity and individual variations? Are the differences between sub-human forms of such activities and human forms different only in degree or are they also qualitatively different?
This search for the presence of human level activities at the level of the lower organisms has been extended to languages also. Scholars have been trying to explore whether there exists some forms of social interaction among animals based on languages. Some of the earliest and classical studies of Wheeler and Fabre have shown evidence for the existence of some elementary forms of social organisation among animals and insects.
It has also been shown that some forms of social interaction and communication exist among birds. A number of studies have been undertaken on sub-human organisms at higher levels like apes and chimpanzees who are the immediate evolutionary ancestors of the human beings.
Such studies have shown that they live in clans and also possess embryonic forms of power hierarchy. This being so, it is only logical for forms of communication to exist among these animals, may be these forms of communication are not linguistic.
If we define language as essentially a system of signs used for expressing and communicating, then there certainly appears to be some form of language though not necessarily phonetic in form. A number of studies involving observation of animals in situations involving coping with certain crises situations have shown that at the levels of animals while one may not find linguistic and verbal communication, nevertheless a variety of body movements, sounds and even emission of certain odours exist and play a definite communicative role and perform functions including expression, influencing, signalling, etc.
Thus, certain sounds are made when an enemy is seen as an expression of a felt threat which in turn acts as a communication to other members of the group, thereby influencing their action and making them run away. Such sounds or actions constitute ‘display or exhibitionistic language’ to communicate with other members.
Among the geese, a set of vocal displays have been repeatedly observed to prepare to escape as a group. Vocalization or other forms of sounds have been found in birds during hatching seasons and these vocalizations set in motion a general reaction to make other birds react in a similar manner. Touch language is also prevalent as preliminary to mating between two members of the same species – one male and the other a female.
Animals at the higher levels of the animal world like apes and chimpanzees have the ability to acquire, store and retrieve information to a much simpler extent than in the case of the human. If this is the case then, at-least at the level of the chimpanzee, there should be some elementary form of language.
A strong case for the presence of such a basic language at the level of the apes has been made out by investigators like C.R. Carpenter. Carpenter and many others have identified anywhere between 9 to 20 sounds with different meanings used by apes. But the one observation has been that while such a sound language may initiate action in other members of the species, nevertheless there is no dialogue or conversation.
The language and communication seems to operate one way. Further, they are found to be used only in emotion led situations and are very situation specific as in attracting a mate or signalling the arrival of an enemy. Thus, situationised considerations of direction and guiding physiological action seem to be the main functions of such sounds. Of course, there is nothing purely verbal and in that sense nonverbal language, speech or communication among members of lower organisms seems to exist.
One may then conclude, if we look at language purely as a tool of expression and communication directed to influence the behaviour of others, there does seem to be adequate evidence to indicate the existence of some rudimentary forms of language among animals and this is in parts in the form of physical movements or sounds or directly involve display, situation specific and one way. Animals do not know how to use a word or a sentence or for that matter any form of verbiage.
Certain investigators however, have gone a little further and tried to find out whether even if there is evidence in the case of higher level animals like gorillas or chimpanzees about their having a language, do they have the structural capacity of the brain? This has been doubted by another group of investigators.
Similarly, one can raise the question, can we teach human language to the apes? A few interesting studies have been undertaken in this regard. In a very interesting study along these lines, Keith Hays and Cathy Hays adopted an infant chimpanzee Vicki and brought her up as a human child.
Despite intensive efforts they found that all attempts to teach Vicki to speak like a human child were futile, Vicki being able to utter hardly three barely recognisable words or sounds after three years of teaching. But at the same time, they found that although Vicki could not utter these words, she was able to comprehend many more words of the English language. Thus, in many other chimpanzees who were studied, it was found that though there is no ability on the part of the animals to utter or speak, they were able to understand and interpret.
In view of this, it was concluded that human language is unique to the human species because they are distinct from animals. But very soon the Pandora’s box was opened again. Reacting to the earlier findings that even man’s closest animal cousin, the chimpanzee could not learn the languages, critics started asking that while the chimpanzee may not be able to speak, speech is not the only component of language and that there should be other aspects of language like comprehension, interpretation, etc., and it is possible that as in the case of speech, if these processes were also investigated then the chimpanzee may be found to be more capable.
Human infants are not capable of producing many speech sounds. It has been found that this is because of their underdeveloped vocal tracts and memory and also because of their inability to make certain articulate movements needed for speech production. Lie Beevan and others found that many mature non-human primates faced the same problem as human infants.
Their vocal tracts are smaller like those of human infants. On the other hand, studies intending to find out whether primates perceive the speech sounds, in ways similar to the ways perceived by human beings, have produced mostly negative results or at any rate results which are not clear.
Overall, there appears to be a broad consensus, perhaps, tentative that primates including chimpanzees are not well endowed with the capacity to acquire the ability to communicate using speech. But, what about other aspects like comprehension?
Children who are not able to speak certainly appear to be quick in other aspects like responding, interpreting, comprehending, etc. as observed by Lenneberg and Maclean and Ruches. Beatrice and Garner undertook a pioneering investigation attempting to teach American sign language to Owashowe – a chimpanzee. Owashowe was brought up in the house trailer, interacting with a number of human beings who while in her presence never spoke verbal languages but used sign communication extensively.
Signs were used to communicate objects; questions were asked in sign form. In the beginning the progress was very slow. But by the end of about 22 weeks Owashowe could acquire a vocabulary of nearly 34 signs and use these under appropriate situations.
Though like human infants, Owashowe’s sign language initially was not very descriptive and clear, gradually situation appropriate and specific sign language was achieved. More remarkably, Owashowe after a number of minutes could combine such signs to produce sentences like “you drink”, “key open” etc.
According to many investigators like Brown, Owashowe’s language was very similar to what human children in the first stage of speech have. Other investigators like Premark based on their studies on chimpanzees arrived at more interesting conclusions.
The task involved here was slightly different. Here, the chimpanzee Sara had to learn to equate certain utterances with a set of distinctly coloured and shaped plastic pieces arranged in a pattern and stuck to a plastic board. The utterances were a pattern of sticking together a set of such pieces. Results were really surprising and the chimpanzees could learn this language to a very high degree of complexity.
Here, the attempt by the experimenter does not require the animal to translate the language into human language terms. She only had to learn a non-verbal way of uttering what was uttered by the investigator. Researches like this show that while chimpanzees may not go far in learning a human language and speak the same, their ability to code, encode and decode symbolic cognitive inputs like colour pieces, cannot be written off.
Research in this area has certainly pointed out that even at the higher level of evolution, the animals are not very capable of learning and speaking the human type language and produce speech sounds. But, because of this, one cannot say with the same degree of certainty that they do not comprehend language symbols, or forms of relations among them.
The adult human beings’ capacity for mastery of human speech is infinitely superior to that of an adult chimpanzee, but at the same time there is a lot of similarity between the vocabulary of a human infant and a chimpanzee. A chimpanzee can learn a language of different types.
Of course, it does not mean much, but one or two sounds become clear. The nature and structure of the brain and the vocal apparatus at the human level thus make a qualitative and quantitative difference in the language behaviour of sub-human organism and the human being.
Apart from this basic biological structure, there are greater number of language based interactions, and also more numerous opportunities for mastering a language, at the disposal of the human being which definitely make for a difference between human language and sub-human language.

Functions of Language:

If language is such an important part of human life, then it certainly must have served human beings very well and also useful purposes. What are the various functions of language? Essentially, as a common man sees, language has two obvious functions; first it serves a person to express oneself and then communicate.
Through an expression one is able to inform, request, persuade, threaten or influence others. This means one is able to relate one’s experiences, fears, wishes, to others and similar experiences of others. This is the beginning of social life. When people are able to express to each other, naturally they are able to interact with each other and understand what others are saying or doing. Based on such an interpretation there is the beginning of action.
This phenomenon goes on. Thus, we may see that language helps in expressing, understanding, interpreting and communicating events those inside a person and when there is a reciprocal action one can see how social interaction starts. The entire fabric of social life is thus based on an ability to express, interpret, understand and influence, first reciprocally, then in an extended manner.
Thus, one may see that language is at the very foundation of human civilisation. Perhaps, this is a very simple statement of what is happening. When I say I understand and interpret, there is a cognitive function; when I say, make others accept or act, there is a social function, one of relating myself to others.
When I talk and smile, this is an affective function. Language helps people to develop, shape perception, share interpretations, share expectations, and share expressions and also feelings and emotions. We may now briefly examine some of the basic functions of language. Some of these are obvious and others are not so obvious.
Let us for a moment imagine that a sub-human organism or a primitive human being faces for the first time a condition of hunger or fear, sees another strange animal or hears a sudden noise. Cutting across all these one would have faced a condition of disturbed equilibrium which might have resulted in the feeling of fear, surprise, joy, delight, hunger, or whatever it is.
However scientific our modern researches may be, common sense tells us that the earliest form of linguistic reaction must have originated under such a situation. A classical example is the birth cry of a new born child.
In all these instances, it may be seen that the origins of language lay in an articulation or expression of the state of the organism; but while being an act of expression, it also becomes an act of trying to understand and interpret the strange feelings or state of affairs.
Now, we may begin our attempts to understand various usages, and functions served by language or linguistic behaviour which includes the sound language of some animals and also the sign language used in various categories.
The functions of language can be classified under two or three broad categories – 1. Expressive and Communicative Functions 2. Interpretative Functions 3. Control function 4. The Functions of Remembering and Thinking 5. The Discovery of One’s Name 6. Social Functions of Language 7. Creative Functions.

Specificities of Languages:

Various languages spoken by different groups of people differ in as many dimensions as there are to language behaviour. The simple language of a stone-age tribal community is far different from one of the developed and complex languages of today. Not only this, languages also change, grow and evolve.
For example, some languages like Latin or Sanskrit are referred to as dead languages in that they have not changed over a time because of not being actively used, particularly in speech, and also because they have not interacted with other languages. But, amidst all these variations across space, and over time, are there any universal characteristics and structures of language?
Here again there is a debate with one group of scholars who argue for the existence of universal characteristics, others deny the existence of any such universal characteristics. But the controversy notwithstanding, there are some universal characteristics of language.

In cross-cultural communication it is very imperative to understand on the cultural presuppositions that lie behind the speaker’s words as well as their interpretations and expectations (Kim 1991, pp. 120-151). Another example of sociolinguistic aspects of language is in the use of invitations. Most of the Latin Americans and Chinese usually respond to invitations by affirming the request though it does not necessarily mean they will attend.

To most British and North Americans, this is dishonesty. Hence it is important to understand that when a Chinese promises to come, they are showing good will rather than immediate disappointment to the host.
herefore, when learning a foreign language, you get to understand that Latin Americans and Chinese base their responses on the social values whereas the North Americans and the British people consider their truth values first. When this is understood, then the situation tends to be easier to both sides. It is hence important to learn and understand foreign language so as to be per with other people so as not to be misunderstood.