In neuropsychology, linguistics, and the philosophy of language, a natural language or ordinary language is any language that has evolved naturally in humans through use and repetition without conscious planning or premeditation. Natural languages can take different forms, such as Vocal language or Sign language. They are distinguished from constructed and such as those used to program computers or to study logic.
Defining natural language
Though the exact definition varies between scholars, natural language can broadly be defined in contrast to artificial or constructed languages (such as computer programming languages and international auxiliary languages) and to other communication systems in nature. Such examples include bees' waggle dance
and whale song, to which researchers have found or applied the linguistic cognates of dialect
and even syntax
All language varieties of are natural languages, although some varieties are subject to greater degrees of published prescriptivism or language regulation than others. Thus nonstandard dialects can be viewed as a wild type in comparison with standard languages. But even an official language with a regulating academy, such as Standard French with the French Academy, is classified as a natural language (for example, in the field of natural language processing), as its prescriptive points do not make it either constructed enough to be classified as a constructed language or controlled enough to be classified as a controlled natural language.
Controlled natural languages are subsets of natural languages whose grammars and dictionaries have been restricted in order to reduce or eliminate both ambiguity and complexity (for instance, by cutting down on rarely used superlative or adverbial forms or irregular verbs
). The purpose behind the development and implementation of a controlled natural language typically is to aid non-native speakers of a natural language in understanding it, or to ease computer processing of a natural language. An example of a widely used controlled natural language is Simplified English, which was originally developed for aerospace
industry maintenance manuals.
Constructed languages and international auxiliary languages
Constructed international auxiliary languages such as Esperanto
(even those that have
) are not generally considered natural languages.
[Gopsill, F. P., "A historical overview of international languages". In International languages: A matter for Interlingua. Sheffield, England: British Interlingua Society, 1990.]
Natural languages have been used to communicate and have evolved in a natural way, whereas Esperanto was designed by L.L. Zamenhof selecting elements from natural languages, not grown from natural fluctuations in vocabulary and syntax. Some natural languages have become naturally "standardized" by children's natural tendency to correct for illogical grammatical structures in their parents' speech, which can be seen in the development of pidgin
(as explained by Steven Pinker in The Language Instinct
), but this is not the case in many languages, including constructed languages such as Esperanto, where strict rules are in place as an attempt to consciously remove such irregularities. The possible exception to this are true native speakers of such languages.
[Proponents contend that there are 200–2000 native speakers of Esperanto.]
More substantive basis for this designation is that the vocabulary, grammar, and orthography of Interlingua are natural; they have been standardized and presented by a linguistic research body, but they predated it and are not themselves considered a product of human invention.
[Alexander Gode, . New York: Storm Publishers, 1951. (Original edition)]
Most experts, however, consider Interlingua to be naturalistic rather than natural.
Latino Sine Flexione, a second naturalistic auxiliary language, is also naturalistic in content but is no longer widely spoken.
[Gopsill, F. P., "Naturalistic international languages". In International languages: A matter for Interlingua. Sheffield, England: British Interlingua Society, 1990.]
Origin of language
ter Meulen, Alice, 2001, "Logic and Natural Language," in Goble, Lou, ed., The Blackwell Guide to Philosophical Logic. Blackwell.