Language shift in the context of Arabized Berber

An ethnicity or ethnic group is a group of people who identify with each other on the basis of perceived shared attributes that distinguish them from other groups. Attributes that ethnicities believe to share include language, culture, common sets of ancestry, traditions, society, religion, history, or social treatment. Ethnicities are maintained through long-term endogamy and may have a narrow or broad spectrum of genetic ancestry, with some groups having mixed genetic ancestry. Ethnicity is sometimes used interchangeably with nation, particularly in cases of ethnic nationalism. It is also used interchangeably with race although not all ethnicities identify as racial groups.

By way of assimilation, acculturation, amalgamation, language shift, intermarriage, adoption and religious conversion, individuals or groups may over time shift from one ethnic group to another. Ethnic groups may be divided into subgroups or tribes, which over time may become separate ethnic groups themselves due to endogamy or physical isolation from the parent group. Conversely, formerly separate ethnicities can merge to form a panethnicity and may eventually merge into one single ethnicity. Whether through division or amalgamation, the formation of a separate ethnic identity is referred to as ethnogenesis.

An Indigenous language, or autochthonous language, is a language that is native to a region and spoken by its Indigenous peoples. Indigenous languages are not necessarily national languages but they can be; for example, Aymara is both an Indigenous language and an official language of Bolivia. Also, national languages are not necessarily Indigenous to the country.

Many Indigenous peoples worldwide have stopped the generational passage of their ancestral languages and have instead adopted the majority language as part of their acculturation into their host culture. Furthermore, many Indigenous languages have been subject to linguicide (language killing). Recognizing their vulnerability, the United Nations proclaimed 2019 the International Year of Indigenous Languages "to draw attention to the critical loss of Indigenous languages and the urgent need to preserve, revitalize and promote Indigenous languages."

The Italic languages form a branch of the Indo-European language family, whose earliest known members were spoken on the Italian Peninsula in the first millennium BC. The most important of the ancient Italic languages was Latin, the official language of ancient Rome, which conquered the other Italic peoples before the common era. The other Italic languages became extinct in the first centuries AD as their speakers were assimilated into the Roman Empire and shifted to some form of Latin. Between the third and eighth centuries AD, Vulgar Latin (perhaps influenced by substrata from the other Italic languages) diversified into the Romance languages, which are the only Italic languages natively spoken today, while Literary Latin also survived.

Besides Latin, the known ancient Italic languages are Faliscan (the closest to Latin), Umbrian and Oscan (or Osco-Umbrian), and South Picene. Other Indo-European languages once spoken in the peninsula whose inclusion in the Italic branch is disputed are Venetic and Siculian. These long-extinct languages are known only from inscriptions in archaeological finds.

The Picts were a group of peoples in what is now Scotland north of the Firth of Forth, in the Early Middle Ages. Where they lived and details of their culture can be gleaned from early medieval texts and Pictish stones. The name Picti appears in written records as an exonym from the late third century AD. They are assumed to have been descendants of the Caledonii and other northern Iron Age tribes. Their territory is referred to as "Pictland" by modern historians. Initially made up of several chiefdoms, it came to be dominated by the Pictish kingdom of Fortriu from the seventh century. During this Verturian hegemony, Picti was adopted as an endonym. This lasted around 160 years until the Pictish kingdom merged with that of Dál Riata to form the Kingdom of Alba, ruled by the House of Alpin. The concept of "Pictish kingship" continued for a few decades until it was abandoned during the reign of Caustantín mac Áeda.

Pictish society was typical of many early medieval societies in northern Europe and had parallels with neighbouring groups. Archaeology gives some impression of their culture. Medieval sources report the existence of a Pictish language, and evidence shows that it was an Insular Celtic language related to the Brittonic spoken by the Celtic Britons to the south. Pictish was gradually displaced by Middle Gaelic as part of the wider Gaelicisation from the late ninth century. Much of their history is known from outside sources, including Bede, hagiographies of saints such as that of Columba by Adomnán, and the Irish annals.

The Indo-Aryan migrations were the migrations into the Indian subcontinent of Indo-Aryan peoples, an ethnolinguistic group that spoke Indo-Aryan languages. These are the predominant languages of today's Bangladesh, Maldives, Nepal, North India, Pakistan, and Sri Lanka.

Indo-Aryan migration into the region, from Central Asia, is considered to have started after 2000 BCE as a slow diffusion during the Late Harappan period and led to a language shift in the northern Indian subcontinent. Several hundred years later, the Iranian languages were brought into the Iranian plateau by the Iranians, who were closely related to the Indo-Aryans.

An extinct language or dead language is a language with no living native speakers. A dormant language is a dead language that still serves as a symbol of ethnic identity to an ethnic group; these languages are often undergoing a process of revitalisation. Languages that have first-language speakers are known as modern or living languages to contrast them with dead languages, especially in educational contexts.

Languages have typically become extinct as a result of the process of cultural assimilation leading to language shift, and the gradual abandonment of a native language in favor of a foreign lingua franca.

The ancient Aramaic alphabet was used to write the Aramaic languages spoken by ancient Aramean pre-Christian peoples throughout the Fertile Crescent. It was also adopted by other peoples as their own alphabet when empires and their subjects underwent linguistic Aramaization during a language shift for governing purposes — a precursor to Arabization centuries later — including among the Assyrians and Babylonians who permanently replaced their Akkadian language and its cuneiform script with Aramaic and its script, and among Jews, but not Samaritans, who adopted the Aramaic language as their vernacular and started using the Aramaic alphabet, which they call "Square Script", even for writing Hebrew, displacing the former Paleo-Hebrew alphabet. The modern Hebrew alphabet derives from the Aramaic alphabet, in contrast to the modern Samaritan alphabet, which derives from Paleo-Hebrew.

The letters in the Aramaic alphabet all represent consonants, some of which are also used as matres lectionis to indicate long vowels. Writing systems, like the Aramaic, that indicate consonants but do not indicate most vowels other than by means of matres lectionis or added diacritical signs, have been called abjads by Peter T. Daniels to distinguish them from alphabets such as the Greek alphabet, that represent vowels more systematically. The term was coined to avoid the notion that a writing system that represents sounds must be either a syllabary or an alphabet, which would imply that a system like Aramaic must be either a syllabary, as argued by Ignace Gelb, or an incomplete or deficient alphabet, as most other writers had said before Daniels. Daniels put forward that this is a different type of writing system, intermediate between syllabaries and 'full' alphabets.

Modern Hebrew (endonym: עִבְרִית חֲדָשָׁה, romanized: 'Ivrit ḥadasha, IPA: [ivˈʁit χadaˈʃa] or [ʕivˈrit ħadaˈʃa]), also known as Israeli Hebrew or simply Hebrew, is the standard form of the Hebrew language spoken today. It is the only extant Canaanite language, as well as one of the oldest languages to be spoken as a native language in the modern day, on account of Hebrew being attested since the 2nd millennium BC. It uses the Hebrew Alphabet, an abjad script written from right-to-left. The current standard was codified as part of the revival of Hebrew in the late 19th and early 20th centuries, and now serves as the sole official and national language of the State of Israel, where it is predominantly spoken by over 10 million people. Thus, Modern Hebrew is nearly universally regarded as the most successful instance of language revitalization in history.

A Northwest Semitic language within the Afroasiatic language family, Hebrew was spoken since antiquity as the vernacular of the Israelites until around the 3rd century BCE, when it was supplanted by a western dialect of the Aramaic language, the local or dominant languages of the regions Jews migrated to, and later Judeo-Arabic, Judaeo-Spanish, Yiddish, and other Jewish languages. Although Hebrew continued to be used for Jewish liturgy, poetry and literature, and written correspondence, it became extinct as a spoken language.

An endangered language or moribund language is a language that is at risk of disappearing as its speakers die out or shift to speaking other languages. Language loss occurs when the language has no more native speakers and becomes a "dead language". If no one can speak the language at all, it becomes an "extinct language". A dead language may still be studied through recordings or writings, but it is still dead or extinct unless there are fluent speakers left. Although languages have always become extinct throughout human history, endangered languages are currently dying at an accelerated rate because of globalization, mass migration, cultural replacement, imperialism, neocolonialism and linguicide (language killing).

Language shift most commonly occurs when speakers switch to a language associated with social or economic power or one spoken more widely, leading to the gradual decline and eventual death of the endangered language. The process of language shift is often influenced by factors such as globalisation, economic authorities, and the perceived prestige of certain languages. The ultimate result is the loss of linguistic diversity and cultural heritage within affected communities. The general consensus is that between 6,000 and 7,000 languages are currently spoken. Some linguists estimate that between 50% and 90% of them will be severely endangered or dead by the year 2100. The 20 most common languages, each with more than 50 million speakers, are spoken by 50% of the world's population, but most languages are spoken by fewer than 10,000 people.

Early Slavs began mass migrating to Southeastern Europe between the first half of the 6th and 7th century in the Early Middle Ages. The rapid demographic spread of the Slavs was followed by a population exchange, mixing and language shift to and from Slavic.

The settlement was facilitated by the substantial decrease of the Southeastern European population during the Plague of Justinian. Another reason was the Late Antique Little Ice Age from 536 to around 660 CE and the series of wars between the Sasanian Empire and the steppe nomads against the Eastern Roman Empire. After the arrival of the Pannonian Avars in the mid-6th century, they continued to conduct incursions into Roman territory, often independently of Avar's influence. After the failed siege of Constantinople in the summer of 626, and successful revolt against the Avars, they remained in the wider Southeast Europe area after they had settled the Byzantine provinces south of the Sava and Danube rivers, from the Adriatic Sea to the Aegean and Black Sea.

The Ryukyuan languages (琉球語派, Ryūkyū-goha; also 琉球諸語, Ryūkyū-shogo or 島言葉 in Ryukyuan, Shima kotoba, literally "Island Speech"), also Lewchewan or Luchuan (/luːˈtʃuːən/), are the indigenous languages of the Ryukyu Islands, the southernmost part of the Japanese archipelago. Along with the Japanese language and the Hachijō language, they make up the Japonic language family.

Just as among Japanese dialects, which can have low mutual intelligibility, the Ryukyuan and mainland Japanese languages are not mutually intelligible. It is not known how many speakers of these languages remain, but language shift toward the use of Standard Japanese and dialects like Okinawan Japanese has resulted in these languages becoming endangered; UNESCO labels four of the languages "definitely endangered" and two others "severely endangered".

Arabization or Arabicization (Arabic: تعريب, romanized: taʻrīb) is a sociological process of cultural change in which a non-Arab society becomes Arab, meaning it either directly adopts, is forced to accept, or becomes strongly influenced by the Arabic language, culture, literature, art, music, and ethnic identity as well as other socio-cultural factors. It is a specific form of cultural assimilation that often includes a language shift or linguistic imperialism. The term applies not only to cultures, but also to individuals, as they acclimate to Arab culture and become "Arabized". Arabization took place after the Muslim conquest of the Middle East and North Africa, as well as during the more recent Arab nationalist policies toward non-Arabic speaking minorities in modern Arab states, such as Algeria, Iraq, Syria, Egypt, Bahrain, and Sudan.

After the rise of Islam in the Hejaz and subsequent Muslims conquests, Arab culture and language spread outside the Arabian Peninsula through trade and intermarriages between members of the non-Arab local population and the peninsular Arabs. The Arabic language began to serve as a lingua franca in these areas and various dialects were formed. This process was accelerated by the migration of various Arab tribes outside of Arabia, such as the Arab migrations to the Maghreb and the Levant.

Lebanese diaspora refers to Lebanese migrants and their descendants who emigrated from Lebanon and now reside in other countries. There are more people of Lebanese origin (15,4 million) living outside Lebanon than within the country (6 million citizens). The Lebanese diaspora consists of Christians, Muslims, Druze, and Jews. The Christians trace their origin to several waves of emigration, starting with the exodus that followed the 1860 Lebanon conflict during the Ottoman Empire.

Under the current Lebanese nationality law, the Lebanese diaspora do not have an automatic right to return to Lebanon. Varying degrees of assimilation and a high degree of inter-ethnic marriages in the Lebanese diaspora communities, regardless of religious affiliation, have caused many of the Lebanese diaspora not to have passed fluency in Arabic to their children, although most still maintain a Lebanese national identity. Several factors have caused Lebanese emigration, including civil wars, attacks on Lebanese sovereignty and land by Israel and Syria, and political and economic crises.

Min is a broad group of Sinitic languages with about 75 million native speakers. These languages are spoken in China in a region centered on modern Fujian Province, stretching from Southern Zhejiang to Eastern Guangdong, as well as on Hainan Island and the neighbouring Leizhou Peninsula. Min varieties are also spoken in Taiwan, and by a large international diaspora, particularly in Southeast Asia. The name Min is shared with the Min River in Fujian, and is also the abbreviated name of Fujian Province. Min languages are not mutually intelligible with one another nor with other varieties of Chinese.

The most widely spoken variety of Min outside of China is Hokkien, a variety of Southern Min which has its origin in Southern Fujian. Amoy Hokkien is the prestige dialect of Hokkien in Fujian, while a majority of Taiwanese people speak a dialect called Taiwanese Hokkien or simply Taiwanese. The majority of Chinese Singaporeans, Chinese Malaysians, Chinese Filipinos, Chinese Indonesians, Chinese Thais, and Chinese Cambodians are of Southern Min-speaking background (particularly Hokkien and Teochew), although some of these communities are shifting to national or regional languages. Communities speaking Eastern Min, Pu-Xian Min, Haklau Min, Leizhou Min, and Hainanese can also be found in parts of the Chinese diaspora, such as in Malaysia, Singapore, and Indonesia.

Persianization (/ˌpɜːrʒəˌnaɪˈzeɪʃən/) or Persification (/ˌpɜːrsɪfɪˈkeɪʃən/; Persian: پارسی‌سازی، پارسِش), is a sociological process of cultural change in which a non-Persian society becomes "Persianate", meaning it either directly adopts or becomes strongly influenced by the Persian language, culture, literature, art, music, and identity as well as other socio-cultural factors. It is a specific form of cultural assimilation that often includes a language shift. The term applies not only to cultures, but also to individuals, as they acclimate to Persian culture and become "Persianized" or "Persified".

Historically, the term was commonly applied to refer to the cultural shift in non-Iranian peoples living within the Persian cultural sphere, particularly during the early and middle Islamic periods, such as Arabs and various Caucasian (such as Georgian, Armenian and Dagestani) and Turkic peoples, including the Seljuks, the Ottomans, and the Ghaznavids. The term has also been applied to the adoption of aspects of Persian culture, including language, by non-Persian peoples living in the regions surrounding the Iranian plateau (Persia), such as Anatolia and the Indian subcontinent.