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There are several other small families and language isolates, as well as obscure languages that have yet to be classified. In addition, Africa has a wide variety of sign languages, many of which are language isolates.
About a hundred of the languages of Africa are widely used for inter-ethnic communication. Arabic, Berber, Igbo, Somali, Swahili, Hausa, Amharic, Oromo, and Yoruba are spoken by tens of millions of people. If clusters of up to a hundred similar languages are counted together, twelve are spoken by 75 percent, and fifteen by 85 percent, of Africans as a first or additional language.
The high linguistic diversity of many African countries (Nigeria alone has over 500 languages, one of the greatest concentrations of linguistic diversity in the world) has made language policy a vital issue in the post-colonial era. In recent years, African countries have become increasingly aware of the value of their linguistic inheritance. Language policies being developed nowadays are mostly aimed at multilingualism. For example, all African languages are considered official languages of the African Union (AU). 2006 was declared by the African Union as the "Year of African Languages". However, although many mid-sized languages are used on the radio, in newspapers, and in primary-school education, and some of the larger ones are considered national languages, only a few are official at the national level.
Most languages spoken in Africa belong to one of three large language families: Afroasiatic, Nilo-Saharan, and Niger–Congo. Another hundred belong to small families such as Ubangian and the various families called Khoisan, or the Indo-European and Austronesian language families which originated outside Africa; the presence of the latter two dates to 2,600 and 1,000 years ago, respectively. In addition, African languages include several unclassified languages and sign languages.
Afroasiatic languages are spoken throughout the Middle East, North Africa, the Horn of Africa, and parts of the Sahel. There are approximately 375 Afroasiatic languages spoken by over 350 million people. The main subfamilies of Afroasiatic are the Berber languages, Semitic languages, Chadic languages and the Cushitic languages. The Afroasiatic Urheimat is uncertain. However, its most extensive sub-branch, the Semitic languages (including Arabic, Amharic and Hebrew among others), seems to have developed in the Arabian peninsula. The Semitic languages are the only branch of the Afroasiatic family of languages that is spoken outside of Africa.
Some of the most widely spoken Afroasiatic languages include Arabic (a Semitic language, and a recent arrival from West Asia), Berber (Berber), Hausa (Chadic), Amharic (Semitic), and Oromo and Somali (Cushitic). Of the world's surviving language families, Afroasiatic has the longest written history, as both the Akkadian language of Mesopotamia and Ancient Egyptian are members.
Nilo-Saharan is extremely diverse and thus a somewhat controversial grouping uniting over a hundred languages from southern Egypt to northern Tanzania and into Nigeria and DR Congo, with the Songhay languages along the middle reaches of the Niger River as a geographic outlier. The languages share some unusual morphology, but if they are related, most of the branches must have undergone major restructuring since diverging from their common ancestor. The inclusion of the Songhay languages is questionable, and doubts have been raised over the Koman, Gumuz, and Kadu branches.
The Niger–Congo language family is the largest group of Africa (and probably of the world) in terms of the number of languages. One of its salient features is an elaborate noun class system with grammatical concord. The vast majority of languages of this family are tonal such as Yoruba and Igbo, Ashanti. A major branch of Niger–Congo languages is the Bantu family, which covers a greater geographic area than the rest of the family put together (see Niger–Congo B (Bantu) in the map above).
The Niger–Kordofanian language family, joining Niger–Congo with the Kordofanian languages of south-central Sudan, was proposed in 1950s by Joseph Greenberg. Today, linguists often use "Niger–Congo" to refer to this entire family, including Kordofanian as a subfamily. One reason for this is that it is not clear whether Kordofanian was the first branch to diverge from rest of Niger–Congo. Mande has been claimed to be equally or more divergent. Niger–Congo is generally accepted by linguists, though a few question the inclusion of Mande and Dogon, and there is no conclusive evidence for the inclusion of Ubangian.
Several languages spoken in Africa belong to language families concentrated or originating outside of the African continent: for example, Malagasy, the language of Madagascar, is an Austronesian language.
Since the colonial era, Indo-European languages such as Afrikaans, English, French, Italian, Portuguese and Spanish have held official status in many countries, and are widely spoken, generally as lingua francas. (See African French and African Portuguese.) German was once widely spoken in Germany's colonies there from the late 1800s until World War I when the Britain and France took over and revoked German's official status.. Despite this, German is still spoken in Namibia, mostly among the white population. Although it lost its official language in the 90's, its has been redesignated as a national language. Indian languages such as Gujarati are spoken by South Asian expatriates exclusively. In earlier historical times, other Indo-European languages could be found in various parts of the continent, such as Old Persian and Greek in Egypt, Latin and Vandalic in North Africa, and Modern Persian in the Horn of Africa
The three small Khoisan families of southern Africa have not been shown to be related to the major families of Africa. In addition, there are various other families which have not been demonstrated to belong to one of these families. (The questionable branches of Nilo-Saharan were covered above, and are not repeated here.)
Khoisan is a term of convenience covering some 30 languages spoken by about 300 000–400 000 people. There are five Khoisan families which have not been shown to be related to each other, Khoe, Tuu, and Kx'a (these are found mainly in Namibia and Botswana) and Sandawe and Hadza of Tanzania, which are language isolates. A striking feature of Khoisan languages, and the reason they are often counted together, is their use of click consonants. Some neighbouring Bantu languages (notably Xhosa and Zulu) have clicks as well, but these were adopted from Khoisan languages. The Khoisan languages are also tonal.
Due partly to its multilingualism and its colonial past, a substantial proportion of the world's creole languages are to be found in Africa. Some are based on Indo-European languages (e.g. Krio from English in Sierra Leone and the very similar Pidgin in Nigeria and parts of Cameroon, Cape Verdean Creole in Cape Verde and Guinea-Bissau Creole in Guinea-Bissau and Senegal both from Portuguese, Seychellois Creole from French in the Seychelles, or Mauritian Creole in Mauritius); some are based on Arabic (e.g., Juba Arabic in the southern Sudan, or Nubi in parts of Uganda and Kenya); some are based on local languages (e.g., Sango, the main language of the Central African Republic.) While in Cameroon a creole based on French, English and local African languages known as Camfranglais has started to become popular.
A fair number of unclassified languages are reported in Africa; many remain unclassified simply for lack of data, but among the better-investigated ones may be listed:
Less-well investigated ones include Irimba, Luo, Mawa, Rer Bare (possibly Bantu), Bete[disambiguation needed] (evidently Jukunoid), Bung (unclear), Kujarge (evidently Chadic), Lufu (Jukunoid), Oropom (possibly spurious), and Weyto (evidently Cushitic). Several of these are extinct, and adequate comparative data is thus unlikely to be forthcoming year.
Hombert & Philippson (2009) list a number of highly divergent African languages that have already been determined to be, or could possibly be, language isolates. According to Hombert & Philippson (2009), Africa should have around 20 separate language phyla and isolates (or more), not just the 4 proposed by Joseph Greenberg in the 1960s. Some other languages recently investigated by Roger Blench and others are also listed.
Many African countries have national sign languages, such as Algerian Sign Language, Tunisian Sign Language, Ethiopian Sign Language, while other sign languages are restricted to small areas or single villages, such as Adamorobe Sign Language in Ghana. Tanzania has seven, one for each of its schools for the Deaf, all of which are discouraged. Not much is known, since little has been published on these languages.
Throughout the long multilingual history of the African continent, African languages have been subject to phenomena like language contact, language expansion, language shift, and language death. A case in point is the Bantu expansion, in which Bantu-speaking peoples expanded over most of Sub-Saharan Africa, displacing Khoi-San speaking peoples from much of East Africa and Southern Africa. Another example is the Arab expansion in the 7th century, which led to the extension of Arabic from its homeland in Asia, into much of North Africa.
Trade languages are another age-old phenomenon in the African linguistic landscape. Cultural and linguistic innovations spread along trade routes and languages of peoples dominant in trade developed into languages of wider communication (linguae francae). Of particular importance in this respect are Berber (North and West Africa), Jula (western West Africa), Fulfulde (West Africa), Hausa (West Africa), Lingala (Congo), Swahili (East Africa), Somali (Horn of Africa) and Arabic (North Africa, West Africa, and East Africa).
After gaining independence, many African countries, in the search for national unity, selected one language, generally the former colonial language, to be used in government and education. However, in recent years, African countries have become increasingly supportive of maintaining linguistic diversity. Language policies that are being developed nowadays are mostly aimed at multilingualism.
Besides the former colonial languages of English, French, Portuguese and Spanish, the following languages are official at the national level in Africa:
The colonial borders established by European powers following the Berlin Conference in 1884-1885 divided a great many ethnic groups and African language speaking communities. In a sense, "cross-border languages" is a misnomer — the speakers did not divide themselves. Nevertheless it describes the reality of many African languages, which has implications for divergence of language on either side of a border (especially when the official languages are different), standards for writing the language, etc. Some notable cross-border languages include Berber (which stretches across much of North Africa and some parts of West Africa), Swahili and Fula.
Some prominent Africans such as former Malian president and current Chairman of the African Commission, Alpha Oumar Konaré, have referred to cross-border languages as a factor that can promote African unity.
Language is not static in Africa any more than in other world regions. In addition to the (probably modest) impact of borders, there are also cases of dialect levelling (such as in Igbo and probably many others), koinés (such as N'Ko and possibly Runyakitara), and emergence of new dialects (such as Sheng). In some countries there are official efforts to develop standardized language versions.
There are also many less widely spoken languages that may be considered endangered languages.
Of the 890 million Africans (as of 2005; 1,000 million in 2009), about 17 percent speak an Arabic dialect. About 10 percent speak Swahili, the lingua franca of East Africa; about 5 percent speak a Berber dialect; and about 5 percent speak Hausa, the lingua franca of West Africa. Other important West African languages are Yoruba, Igbo and Fula. Major Horn of Africa languages are Amharic, Oromo and Somali. Important South African languages are Zulu and Afrikaans.
English, French, Portuguese and Spanish are important languages in Africa: 130, 115, 20, 10 million Africans speak them as either native or secondary languages. Through (among other factors) sheer demographic weight, Africans are increasingly taking ownership of these four world languages and having an ever greater influence on their development and growth.
Some linguistic features are particularly common among languages spoken in Africa, whereas others are less common. Such shared traits probably are not due to a common origin of all African languages. Instead, some may be due to language contact (resulting in borrowing) and specific idioms and phrases may be due to a similar cultural background.
Some widespread phonetic features include:
Tonal languages are found throughout the world but are especially numerous in Africa. Both the Nilo-Saharan and the Khoi-San phyla are fully tonal. The large majority of the Niger–Congo languages is also tonal. Tonal languages are also found in the Omotic, Chadic, and South & East Cushitic branches of Afroasiatic. The most common type of tonal system opposes two tone levels, High (H) and Low (L). Contour tones do occur, and can often be analysed as two or more tones in succession on a single syllable. Tone melodies play an important role, meaning that it is often possible to state significant generalizations by separating tone sequences ("melodies") from the segments that bear them. Tonal sandhi processes like tone spread, tone shift, and downstep and downdrift are common in African languages.
Widespread syntactical structures include the common use of adjectival verbs and the expression of comparison by means of a verb 'to surpass'. The Niger–Congo languages are famous for having very large numbers of genders (noun classes) which cause agreement in verbs and other words. Case, tense, and other categories may be distinguished only by tone.
Quite often, only one term is used for both animal and meat; the word nama or nyama for animal/meat is particularly widespread in otherwise widely divergent African languages.