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linguistics Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...
, a stratum (
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
for 'layer') or strate is a historical layer of
language Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...
that influences or is influenced by another language through contact. The notion of "strata" was first developed by the Italian linguist Graziadio Isaia Ascoli, and became known in the English-speaking world through the work of two different authors in 1932. Both concepts apply to a situation where an intrusive language establishes itself in the territory of another, typically as the result of
migration Migration, migratory, or migrate may refer to: Human migration * Human migration, physical movement by humans from one region to another ** International migration, when peoples cross state boundaries and stay in the host state for some minimum le ...
. Whether the superstratum case (the local language persists and the intrusive language disappears) or the substratum one (the local language disappears and the intrusive language persists) applies will normally only be evident after several generations, during which the intrusive language exists within a
diaspora A diaspora ( ) is a population that is scattered across regions which are separate from its geographic place of birth, place of origin. The word is used in reference to people who identify with a specific geographic location, but currently resi ...
culture. In order for the intrusive language to persist, the ''substratum'' case, the immigrant population will either need to take the position of a political
elite In political and sociological theory, the elite (, from , to select or to sort out) are a small group of powerful or wealthy people who hold a disproportionate amount of wealth, privilege, political power, or skill in a group. Defined by the ...
or immigrate in significant numbers relative to the local population, i.e., the intrusion qualifies as an invasion or
colonisation 475px, Map of the year each country achieved List of sovereign states by date of formation, independence. Colonization (British English: colonisation) is a process of establishing occupation of or control over foreign territories or peoples f ...
. An example would be the
Roman Empire The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Roman people, Romans conquered most of this during the Roman Republic, Republic, and it was ruled by emperors following Octavian's assumption of ...
giving rise to
Romance languages The Romance languages, also known as the Latin or Neo-Latin languages, are the languages that are Language family, directly descended from Vulgar Latin. They are the only extant subgroup of the Italic languages, Italic branch of the Indo-E ...
outside Italy, displacing
Gaulish Gaulish is an extinct Celtic languages, Celtic language spoken in parts of Continental Europe before and during the period of the Roman Empire. In the narrow sense, Gaulish was the language of the Celts of Gaul (now France, Luxembourg, Belgium, ...
and many other
Indo-European languages The Indo-European languages are a language family native to the northern Indian subcontinent, most of Europe, and the Iranian plateau with additional native branches found in regions such as Sri Lanka, the Maldives, parts of Central Asia (e. ...
. The ''superstratum'' case refers to elite invading populations that eventually adopt the language of the native lower classes. An example would be the
Burgundians The Burgundians were an early Germanic peoples, Germanic tribe or group of tribes. They appeared east in the middle Rhine region in the third century AD, and were later moved west into the Roman Empire, in Roman Gaul, Gaul. In the first and seco ...
and
Franks file:Frankish arms.JPG, Aristocratic Frankish burial items from the Merovingian dynasty The Franks ( or ; ; ) were originally a group of Germanic peoples who lived near the Rhine river, Rhine-river military border of Germania Inferior, which wa ...
in France, who eventually abandoned their Germanic dialects in favor of other Indo-European languages of the Romance branch, profoundly influencing the local speech in the process.


Substratum

A substratum (plural: substrata) or substrate is a language that an intrusive language influences, which may or may not ultimately change it to become a new language. The term is also used of substrate interference, i.e. the influence the substratum language exerts on the replacing language. According to some classifications, this is one of three main types of linguistic interference: substratum interference differs from both adstratum, which involves no language replacement but rather mutual borrowing between languages of equal "value", and
superstratum In linguistics, a stratum (Latin for 'layer') or strate is a historical layer of language that influences or is influenced by another language through contact. The notion of "strata" was first developed by the Italian linguist Graziadio Isaia A ...
, which refers to the influence a socially dominating language has on another, receding language that might eventually be relegated to the status of a substratum language. In a typical case of substrate interference, a Language A occupies a given territory and another Language B arrives in the same territory, brought, for example, with migrations of population. Language B then begins to supplant language A: the speakers of Language A abandon their own language in favor of the other language, generally because they believe that it will help them achieve certain goals within government, the workplace, and in social settings. During the language shift, the receding language A still influences language B, for example, through the transfer of
loanword A loanword (also a loan word, loan-word) is a word at least partly assimilated from one language (the donor language) into another language (the recipient or target language), through the process of borrowing. Borrowing is a metaphorical term t ...
s, place names, or grammatical patterns from A to B. In most cases, the ability to identify substrate influence in a language requires knowledge of the structure of the substrate language. This can be acquired in numerous ways: * The substrate language, or some later descendant of it, still survives in a part of its former range; * Written records of the substrate language may exist to various degrees; * The substrate language itself may be unknown entirely, but it may have surviving close relatives that can be used as a base of comparison. One of the first-identified cases of substrate influence is an example of a substrate language of the second type:
Gaulish Gaulish is an extinct Celtic languages, Celtic language spoken in parts of Continental Europe before and during the period of the Roman Empire. In the narrow sense, Gaulish was the language of the Celts of Gaul (now France, Luxembourg, Belgium, ...
, from the ancient Celtic people the Gauls. The
Gauls The Gauls (; , ''Galátai'') were a group of Celts, Celtic peoples of mainland Europe in the Iron Age Europe, Iron Age and the Roman Gaul, Roman period (roughly 5th century BC to 5th century AD). Their homeland was known as Gaul (''Gallia''). Th ...
lived in the modern French-speaking territory before the arrival of the Romans, namely the invasion of Julius Caesar's army. Given the cultural, economic and political advantages that came with being a Latin speaker, the Gauls eventually abandoned their language in favor of the language brought to them by the Romans, which evolved in this region, until eventually it took the form of the French language that is known today. The Gaulish speech disappeared in the late Roman era, but remnants of its vocabulary survive in some French words, approximately 200, as well as place-names of Gaulish origin.Giovanni Battista Pellegrini, "Substrata", in ''Romance Comparative and Historical Linguistics'', ed. Rebecca Posner et al. (The Hague: Mouton de Gruyter, 1980), 65. It is posited that some structural changes in French were shaped at least in part by Gaulish influence including diachronic sound changes and
sandhi Sandhi ( ; , ) is any of a wide variety of sound changes that occur at morpheme or word boundaries. Examples include fusion of sounds across word boundaries and the alteration of one sound depending on nearby sounds or the grammatical function o ...
phenomena due to the retention of Gaulish phonetic patterns after the adoption of Latin,
calque In linguistics, a calque () or loan translation is a word or phrase borrowed from another language by literal word-for-word or root-for-root translation. When used as a verb, "to calque" means to borrow a word or phrase from another language ...
s such as ''aveugle'' ("blind", literally without eyes, from Latin ''ab oculis'', which was a calque on the Gaulish word with the same semantic construction as modern French) with other Celtic calques possibly including "oui", the word for yes,Matasović, Ranko. 2007. “Insular Celtic as a Language Area”. In Tristam, Hildegard L.C. 2007, ''The Celtic Languages in Contact''. Bonn: Papers from the Workshop within the Framework of the XIII International Congress of Celtic Studies. Page 106. while syntactic and morphological effects are also posited. Other examples of substrate languages are the influence of the now extinct North Germanic
Norn language Norn is an extinct North Germanic languages, North Germanic language that was spoken in the Northern Isles (Orkney and Shetland) off the north coast of mainland Scotland and in Caithness in the far north of the Scottish mainland. After Orkney and ...
on the Scots dialects of the
Shetland Shetland (until 1975 spelled Zetland), also called the Shetland Islands, is an archipelago in Scotland lying between Orkney, the Faroe Islands, and Norway, marking the northernmost region of the United Kingdom. The islands lie about to the ...
and
Orkney Orkney (), also known as the Orkney Islands, is an archipelago off the north coast of mainland Scotland. The plural name the Orkneys is also sometimes used, but locals now consider it outdated. Part of the Northern Isles along with Shetland, ...
islands. In the Arab
Middle East The Middle East (term originally coined in English language) is a geopolitical region encompassing the Arabian Peninsula, the Levant, Turkey, Egypt, Iran, and Iraq. The term came into widespread usage by the United Kingdom and western Eur ...
and
North Africa North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of t ...
, colloquial
Arabic Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns lang ...
dialects, most especially Levantine, Egyptian, and
Maghreb The Maghreb (; ), also known as the Arab Maghreb () and Northwest Africa, is the western part of the Arab world. The region comprises western and central North Africa, including Algeria, Libya, Mauritania, Morocco, and Tunisia. The Maghreb al ...
dialects, often exhibit significant substrata from other regional Semitic (especially
Aramaic Aramaic (; ) is a Northwest Semitic language that originated in the ancient region of Syria and quickly spread to Mesopotamia, the southern Levant, Sinai, southeastern Anatolia, and Eastern Arabia, where it has been continually written a ...
), and Berber languages.
Yemeni Arabic Yemeni Arabic () is a cluster of varieties of Arabic spoken in Yemen and southwestern Saudi Arabia. It is generally considered a very conservative dialect cluster, having many classical features not found across most of the Arabic-speaking world ...
has Modern South Arabian, Old South Arabian and Himyaritic substrata. Typically,
Creole language A creole language, or simply creole, is a stable form of contact language that develops from the process of different languages simplifying and mixing into a new form (often a pidgin), and then that form expanding and elaborating into a full-fl ...
s have multiple substrata, with the actual influence of such languages being indeterminate.


Unattested substrata

In the absence of all three lines of evidence mentioned above, linguistic substrata may be difficult to detect. Substantial indirect evidence is needed to infer the former existence of a substrate. The nonexistence of a substrate is difficult to show, and to avoid digressing into speculation, burden of proof must lie on the side of the scholar claiming the influence of a substrate. The principle of
uniformitarianism Uniformitarianism, also known as the Doctrine of Uniformity or the Uniformitarian Principle, is the assumption that the same natural laws and processes that operate in our present-day scientific observations have always operated in the universe in ...
and results from the study of human genetics suggest that many languages have formerly existed that have since then been replaced under expansive language families, such as Indo-European, Afro-Asiatic, Uralic or Bantu. However, it is not a given that such expansive languages would have acquired substratum influence from the languages they have replaced. Several examples of this type of substratum have still been claimed. For example, the earliest form of the
Germanic languages The Germanic languages are a branch of the Indo-European languages, Indo-European language family spoken natively by a population of about 515 million people mainly in Europe, North America, Oceania, and Southern Africa. The most widely spoke ...
may have been influenced by a non-Indo-European language, purportedly the source of about one quarter of the most ancient Germanic vocabulary. There are similar arguments for a Sanskrit substrate, a Greek one, and a substrate underlying the
Sami languages Acronyms * SAMI, ''Synchronized Accessible Media Interchange'', a closed-captioning format developed by Microsoft * Saudi Arabian Military Industries, a government-owned defence company * South African Malaria Initiative, a virtual expertise ...
. Relatively clear examples are the
Finno-Ugric languages Finno-Ugric () is a traditional linguistic grouping of all languages in the Uralic language family except for the Samoyedic languages. Its once commonly accepted status as a subfamily of Uralic is based on criteria formulated in the 19th centur ...
of the Chude and the " Volga Finns" ( Merya, Muromian, and Meshcheran): while unattested, their existence has been noted in medieval chronicles, and one or more of them have left substantial influence in the Northern Russian dialects. By contrast, more contentious cases are the Vasconic substratum theory and Old European hydronymy, which hypothesize large families of substrate languages across western Europe. Some smaller-scale unattested substrates that remain under debate involve alleged extinct branches of the Indo-European family, such as " Nordwestblock" substrate in the Germanic languages, and a "Temematic" substrate in Balto-Slavic, proposed by Georg Holzer. The name ''Temematic'' is an abbreviation of "tenuis, media, media aspirata, tenuis", referencing a sound shift presumed common to the group. When a substrate language or its close relatives cannot be directly studied, their investigation is rooted in the study of
etymology Etymology ( ) is the study of the origin and evolution of words—including their constituent units of sound and meaning—across time. In the 21st century a subfield within linguistics, etymology has become a more rigorously scientific study. ...
and
linguistic typology Linguistic typology (or language typology) is a field of linguistics that studies and classifies languages according to their structural features to allow their comparison. Its aim is to describe and explain the structural diversity and the co ...
. The study of unattested substrata often begins from the study of ''substrate words'', which lack a clear etymology. Such words can in principle still be native inheritance, lost everywhere else in the language family, but they might in principle also originate from a substrate. The sound structure of words of unknown origin — their
phonology Phonology (formerly also phonemics or phonematics: "phonemics ''n.'' 'obsolescent''1. Any procedure for identifying the phonemes of a language from a corpus of data. 2. (formerly also phonematics) A former synonym for phonology, often pre ...
and morphology — can often suggest hints in either direction. So can their meaning: words referring to the natural landscape, in particular indigenous fauna and flora, have often been found especially likely to derive from substrate languages. None of these conditions is sufficient by itself to claim any one word as originating from an unknown substratum. Occasionally words that have been proposed to be of substrate origin will be found out to have cognates in more distantly related languages after all, and therefore likely native: an example is Proto-Indo-European ''*mori'' 'sea', found widely in the northern and western Indo-European languages, but in more eastern Indo-European languages only in Ossetic.


Concept history

Although the influence of the prior language when a community speaks, and adopts, a new one may have been informally acknowledged beforehand, the concept was formalized and popularized initially in the late 19th century. As historical phonology emerged as a discipline, the initial dominant viewpoint was that influences from
language contact Language contact occurs when speakers of two or more languages or varieties interact with and influence each other. The study of language contact is called contact linguistics. Language contact can occur at language borders, between adstratum ...
on phonology and grammar should be assumed to be marginal, and an internal explanation should always be favored if possible. As articulated by Max Mueller in 1870, ("there are no mixed languages"). In the 1880s, dissent began to crystallize against this viewpoint. Within Romance language linguistics, the 1881 ''Lettere glottologiche'' of Graziadio Isaia Ascoli argued that the early phonological development of French and other
Gallo-Romance languages The Gallo-Romance branch of the Romance languages includes in the narrowest sense the ''langues d'oïl'' and Franco-Provençal. However, other definitions are far broader and variously encompass the Occitan or Occitano-Romance, Gallo-Italic o ...
was shaped by the retention by Celts of their "oral dispositions" even after they had switched to Latin. In 1884, Hugo Schuchardt's related but distinct concept of
creole languages A creole language, or simply creole, is a stable form of contact language that develops from the process of different languages simplifying and mixing into a new form (often a pidgin), and then that form expanding and elaborating into a full-fl ...
was used to counter Mueller's view. In modern historical linguistics, debate persists on the details of how language contact may induce structural changes. The respective extremes of "all change is contact" and "there are no structural changes ever" have largely been abandoned in favor of a set of conventions on how to demonstrate contact induced structural changes. These include adequate knowledge of the two languages in question, a historical explanation, and evidence that the contact-induced phenomenon did not exist in the recipient language before contact, among other guidelines.


Superstratum

A superstratum (plural: superstrata) or superstrate offers the counterpart to a substratum. When a different language influences a base language to result in a new language, linguists label the influencing language a superstratum and the influenced language a substratum. A superstrate may also represent an imposed linguistic element akin to what occurred with English and Norman after the Norman Conquest of 1066 when use of the English language carried low prestige. The
international scientific vocabulary International scientific vocabulary (ISV) comprises scientific and specialized words whose language of origin may or may not be certain, but which are in current use in several modern languages (that is, translingually, whether in naturalized, lo ...
coinages from Greek and Latin roots adopted by European languages (and subsequently by other languages) to describe scientific topics (sociology, zoology, philosophy, botany, medicine, all "
-logy ''-logy'' is a suffix in the English language, used with words originally adapted from Ancient Greek ending in ('). The earliest English examples were anglicizations of the French '' -logie'', which was in turn inherited from the Latin '' -l ...
" words, etc.) can also be termed a superstratum, although for this last case, " adstratum" might be a better designation (despite the prestige of science and of its language). In the case of French, for example,
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
is the superstrate and
Gaulish Gaulish is an extinct Celtic languages, Celtic language spoken in parts of Continental Europe before and during the period of the Roman Empire. In the narrow sense, Gaulish was the language of the Celts of Gaul (now France, Luxembourg, Belgium, ...
the substrate. Some linguists contend that Japanese (and
Japonic languages Japonic or Japanese–Ryukyuan () is a language family comprising Japanese language, Japanese, spoken in the main islands of Japan, and the Ryukyuan languages, spoken in the Ryukyu Islands. The family is universally accepted by linguists, and sig ...
in general) consists of an Altaic superstratum projected onto an Austronesian substratum. Some scholars also argue for the existence of Altaic superstrate influences on
varieties of Chinese There are hundreds of local Chinese language varieties forming a branch of the Sino-Tibetan languages, Sino-Tibetan language family, many of which are not Mutual intelligibility, mutually intelligible. Variation is particularly strong in the m ...
spoken in
Northern China Northern China () and Southern China () are two approximate regions that display certain differences in terms of their geography, demographics, economy, and culture. Extent The Qinling, Qinling–Daba Mountains serve as the transition zone ...
. In this case, however, the superstratum refers to influence, not language succession. Other views detect ''sub''strate effects.


Adstratum

An adstratum (plural: adstrata) or adstrate is a language that influences another language by virtue of geographic proximity, not by virtue of its relative prestige. For example, early in
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
's history,
Old Norse Old Norse, also referred to as Old Nordic or Old Scandinavian, was a stage of development of North Germanic languages, North Germanic dialects before their final divergence into separate Nordic languages. Old Norse was spoken by inhabitants ...
served as an adstrate, contributing to the lexical structure of
Old English Old English ( or , or ), or Anglo-Saxon, is the earliest recorded form of the English language, spoken in England and southern and eastern Scotland in the Early Middle Ages. It developed from the languages brought to Great Britain by Anglo-S ...
.For example, ''take'' replaced earlier ''niman'' in the lexical slot of a transitive verb for "to take", though archaic forms of ''to nim'' survived in England. The phenomenon is less common today in standardized linguistic varieties and more common in colloquial forms of speech. Modern nations tend to favour a single linguistic variety, often corresponding to the
dialect A dialect is a Variety (linguistics), variety of language spoken by a particular group of people. This may include dominant and standard language, standardized varieties as well as Vernacular language, vernacular, unwritten, or non-standardize ...
of the capital and other important regions, over others. In
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
, where dozens of languages are widespread, many languages could be said to share an adstratal relationship, but
Hindi Modern Standard Hindi (, ), commonly referred to as Hindi, is the Standard language, standardised variety of the Hindustani language written in the Devanagari script. It is an official language of India, official language of the Government ...
is certainly a dominant adstrate in North India. A different example would be the sociolinguistic situation in
Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
, where the French and Dutch languages have roughly the same status. They could justifiably be called adstrates to each other as each has provided a large set of lexical specifications to the other. The term adstratum is also used to identify systematic influences or a layer of borrowings in a given language from another language, independently of whether the two languages continue coexisting as separate entities. Many modern languages have an appreciable adstratum from English, due both to the cultural influence and economic preponderance of the United States on international markets, and the earlier colonization by the
British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
that made English a global
lingua franca A lingua franca (; ; for plurals see ), also known as a bridge language, common language, trade language, auxiliary language, link language or language of wider communication (LWC), is a Natural language, language systematically used to make co ...
. The Greek and Latin coinages adopted by European languages, including English and now languages worldwide, to describe scientific topics, sociology, medicine, anatomy, biology, all the '- logy' words, etc., are also justifiably called adstrata. Another example is found in Spanish and Portuguese, which contain a heavy Semitic, particularly Arabic, adstratum.
Yiddish Yiddish, historically Judeo-German, is a West Germanic language historically spoken by Ashkenazi Jews. It originated in 9th-century Central Europe, and provided the nascent Ashkenazi community with a vernacular based on High German fused with ...
is a linguistic variety of
High German The High German languages (, i.e. ''High German dialects''), or simply High German ( ) – not to be confused with Standard High German which is commonly also called "High German" – comprise the varieties of German spoken south of the Ben ...
with adstrata from
Hebrew Hebrew (; ''ʿÎbrit'') is a Northwest Semitic languages, Northwest Semitic language within the Afroasiatic languages, Afroasiatic language family. A regional dialect of the Canaanite languages, it was natively spoken by the Israelites and ...
and
Aramaic Aramaic (; ) is a Northwest Semitic language that originated in the ancient region of Syria and quickly spread to Mesopotamia, the southern Levant, Sinai, southeastern Anatolia, and Eastern Arabia, where it has been continually written a ...
, mostly in the sphere of religion.
Slavic languages The Slavic languages, also known as the Slavonic languages, are Indo-European languages spoken primarily by the Slavs, Slavic peoples and their descendants. They are thought to descend from a proto-language called Proto-Slavic language, Proto- ...
were linked geographically to Yiddish-speaking villages in Eastern Europe for centuries up until the
Holocaust The Holocaust (), known in Hebrew language, Hebrew as the (), was the genocide of History of the Jews in Europe, European Jews during World War II. From 1941 to 1945, Nazi Germany and Collaboration with Nazi Germany and Fascist Italy ...
.


Notable examples of possible substrate or superstrate influence


Substrate influence on superstrate


Superstrate influence on substrate


See also

*
Language shift Language shift, also known as language transfer, language replacement or language assimilation, is the process whereby a speech community shifts to a different language, usually over an extended period of time. Often, languages that are perceived ...
* Language transfer *
Trans-cultural diffusion In cultural anthropology and cultural geography, cultural diffusion, as conceptualized by Leo Frobenius in his 1897/98 publication ''Der westafrikanische Kulturkreis'', is the spread of culture, cultural items—such as ideas, fashion, styles, rel ...
*
Pre-Greek substrate The pre-Greek substrate (or substratum) consists of the unknown pre-Greek language or languages (either Pre-Indo-European languages, Pre-Indo-European or other Indo-European languages) spoken in prehistoric Greece prior to the emergence of the Pr ...
* Graziadio Isaia Ascoli *
Creole language A creole language, or simply creole, is a stable form of contact language that develops from the process of different languages simplifying and mixing into a new form (often a pidgin), and then that form expanding and elaborating into a full-fl ...
* Relexification *
Proto-Indo-European language Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family. No direct record of Proto-Indo-European exists; its proposed features have been derived by linguistic reconstruction from documented Indo-Eu ...


References


Further reading

*Benedict, Paul K. (1990). ''Japanese/Austro-Tai''. Ann Arbor: Karoma. *Cravens, Thomas D. (1994). "Substratum". ''The Encyclopedia of Language and Linguistics'', ed. by R. E. Asher et al. Vol. 1, pp. 4396–4398. Oxford: Pergamon Press. * Hashimoto, Mantaro J. (1986). "The Altaicization of Northern Chinese". ''Contributions to Sino-Tibetan studies'', eds John McCoy & Timothy Light, 76–97. Leiden: Brill. * Janhunen, Juha (1996). ''Manchuria: An Ethnic History''. Helsinki: Finno-Ugrian Society. *Jungemann, Frédéric H. (1955). ''La teoría del substrato y los dialectos Hispano-romances y gascones''. Madrid. *Lewin, Bruno (1976)
"Japanese and Korean: The Problems and History of a Linguistic Comparison"
''Journal of Japanese Studies'' 2:2.389–412 *Matsumoto, Katsumi (1975). "Kodai nihongoboin soshikikõ: naiteki saiken no kokoromi". ''Bulletin of the Faculty of Law and Letters'' (Kanazawa University) 22.83–152. *McWhorter, John (2007)
''Language Interrupted: Signs of Non-Native Acquisition in Standard Language Grammars''
USA: Oxford University Press. *Miller, Roy Andrew (1967). ''The Japanese language''. Chicago: University of Chicago Press. *Murayama, Shichiro (1976)
"The Malayo-Polynesian Component in the Japanese Language"
''Journal of Japanese Studies'' 2:2.413–436 *Shibatani, Masayoshi (1990). ''The languages of Japan''. Cambridge: Cambridge UP. *Singler, John Victor (1983)
"The influence of African languages on pidgins and creoles"
''Current Approaches to African Linguistics (vol. 2)'', ed. by J. Kaye ''et al.'', 65–77. Dordrecht. *Singler, John Victor (1988).
The homogeneity of the substrate as a factor in pidgin/creole genesis
. ''Language'' 64.27–51. *Vovin, Alexander (1994). "Long-distance relationships, reconstruction methodology and the origins of Japanese". ''Diachronica'' 11:1.95–114. * * {{DEFAULTSORT:Stratum (Linguistics) Language contact Historical linguistics