Historical linguistics, also known as diachronic linguistics, is the scientific study of how languages change over time. It seeks to understand the nature and causes of linguistic change and to trace the evolution of languages. Historical linguistics involves several key areas of study, including the reconstruction of ancestral languages, the classification of languages into families,(comparative linguistics) and the analysis of the cultural and social influences on language development.
Anthropological linguistics is the subfield of linguistics and anthropology which deals with the place of language in its wider social and cultural context, and its role in making and maintaining cultural practices and societal structures. While many linguists believe that a true field of anthropological linguistics is nonexistent, preferring the term linguistic anthropology to cover this subfield, many others regard the two as interchangeable.
A dialect continuum or dialect chain is a series of language varieties spoken across some geographical area such that neighboring varieties are mutually intelligible, but the differences accumulate over distance so that widely separated varieties may not be. This is a typical occurrence with widely spread languages and language families around the world, when these languages did not spread recently. Some prominent examples include the Indo-Aryan languages across large parts of India, varieties of Arabic across north Africa and southwest Asia, the Turkic languages, the varieties of Chinese, and parts of the Romance, Germanic and Slavic families in Europe. Terms used in older literature include dialect area and L-complex.
An isogloss, also called a heterogloss, is the geographic boundary of a certain linguistic feature, such as the pronunciation of a vowel, the meaning of a word, or the use of some morphological or syntactic feature. Isoglosses are a subject of study in dialectology, in which they demarcate the differences between regional dialects of a language; in areal linguistics, in which they represent the extent of borrowing of features between languages in contact with one another; and in the wave model of historical linguistics, in which they indicate the similarities and differences between members of a language family.
In the field of dialectology, a diasystem or polylectal grammar is a linguistic analysis set up to encode or represent a range of related varieties in a way that displays their structural differences.
In geolinguistics, areal features are elements shared by languages or dialects in a geographic area, particularly when such features are not descended from a proto-language, i.e. a common ancestor language. That is, an areal feature is contrasted with lingual-genealogically determined similarity within the same language family. Features may diffuse from one dominant language to neighbouring languages.
Dialectology is the scientific study of dialects: subsets of languages. Though in the 19th century a branch of historical linguistics, dialectology is often now considered a sub-field of, or subsumed by, sociolinguistics. It studies variations in language based primarily on geographic distribution and their associated features. Dialectology deals with such topics as divergence of two local dialects from a common ancestor and synchronic variation.
A diaphoneme is an abstract phonological unit that identifies a correspondence between related sounds of two or more varieties of a language or language cluster. For example, some English varieties contrast the vowel of late with that of wait or eight. Other English varieties contrast the vowel of late or wait with that of eight. This non-overlapping pair of phonemes from two different varieties can be reconciled by positing three different diaphonemes: A first diaphoneme for words like late, a second diaphoneme for words like wait, and a third diaphoneme for words like eight.
Indosphere is a term coined by the linguist James Matisoff for areas of Indian linguistic influence in the neighboring Southern Asian, Southeast Asian, and East Asian regions. It is commonly used in areal linguistics in contrast with the Sinophone languages of the Mainland Southeast Asia linguistic area of the Sinosphere. Notably, unlike terms such as Lusophone or Francophone that refer to the multinational spread and influence of a single language with multiple dialects, this term refers to all languages that are considered to originate in India, of which there are 22 recognised languages alone across several major language families, including Indo-European and Dravidian. It considers these collectively in regards to the influence of these languages on the languages of other countries, rather than from the perspective of the spread of the language only.
Language geography is the branch of human geography that studies the geographic distribution of language(s) or its constituent elements. Linguistic geography can also refer to studies of how people talk about the landscape. For example, toponymy is the study of place names. Landscape ethnoecology, also known as ethnophysiography, is the study of landscape ontologies and how they are expressed in language.
Variation is a characteristic of language: there is more than one way of saying the same thing in a given language. Variation can exist in domains such as pronunciation, lexicon, grammar, and other features. Different communities or individuals speaking the same language may differ from each other in their choices of which of the available linguistic features to use, and how often, and the same speaker may make different choices on different occasions.
In historical linguistics, the wave model or wave theory is a model of language change in which a new language feature (innovation) or a new combination of language features spreads from its region of origin, being adopted by a gradually expanding cluster of dialects. Each innovation starts at a certain place, and spreads from speaker to speaker, from dialect to dialect, in the same fashion as waves on the water.
The dialects of Macedonian comprise the Slavic dialects spoken in the Republic of North Macedonia as well as some varieties spoken in the wider geographic region of Macedonia. They are part of the dialect continuum of South Slavic languages that joins Macedonian with Bulgarian to the east and Torlakian to the north into the group of the Eastern South Slavic languages. The precise delimitation between these languages is fleeting and controversial.
Hashimoto Mantarō was a Japanese sinologist and linguist who is best known for advocating research on language geography, linguistic typology, and how different areal features in the varieties of Chinese reflect contact with other language families.
Joan Veny i Clar is a linguist and Catalan dialectologist from Majorca, considered one of the most prestigious and renowned of the Catalan Countries. He is the author of Els parlars catalans, an essential book for Catalan dialectology, synthesis of the dialectal variation of the entire space of the Catalan Countries; and furthermore a dense and rich work, made in conjunction with Lydia Pons: Linguistic Atlas of the Catalan Domain.
The Linguistic Atlas of Chinese Dialects, edited by Cao Zhiyun and published in 2008 in three volumes, is a dialect atlas documenting the geography of varieties of Chinese. Unlike the Language Atlas of China (1987), which aims to map the boundaries of both minority languages and Chinese dialect groups, the new atlas is a collection of maps of various features of dialects, in the tradition of the Atlas linguistique de la France and its successors.
Perceptual dialectology is the scientific study of how ordinary individuals perceive variation in language—where they believe it exists, where they believe it comes from, how they believe it functions, and how they socially evaluate it.
Manuel Alvar was a Spanish linguist, historian, and university professor who specialized in the study of dialectology and philology of the Spanish language. Throughout his career, Alvar oversaw and influenced the creation of many Spanish linguistic atlases; maps which recorded speech variations in a given geographical area. He served as Director of the Real Academia Española for four years and was a member of language academies throughout Europe and Latin America.
Geolinguistic organizations may be divided into academic associations, research institutes, and academic journals.
The American Society of Geolinguistics is the oldest organization devoted exclusively to research in the field of geolinguistics with the definition given by the Society to the term geolinguistics, currently being: "An academic discipline involving the analysis and implications of the geographical location, distribution and structure of language varieties within a temporal framework, either in isolation or in contact and/or conflict with one another, being originally conceived of by Mario Pei as being a branch of linguistics which would be used to do objective-oriented research on real-life language issues and where interdisciplinary approaches would be acceptable."
