Classification and family
Yorùbá belongs to the Yoruboid group of the Volta-Niger branch, itself part of the Benue-Congo division of the vast Niger-Congo language family, which covers most of sub-Saharan Africa S1S3. Within Nigeria it is one of the country's three languages given major-language status under the National Policy on Education, alongside hausa language and igbo language, and it is the mother tongue of the yoruba people S2. Closely related Yoruboid varieties are spoken by neighbouring communities in Benin and Togo, reflecting a dialect continuum rather than a single sharply bounded language S1
Speakers and geographic distribution
As with Nigeria's other major languages, speaker estimates vary by year and methodology. A 2019 overview of Nigerian language policy put native Yorùbá speakers at roughly 40 million S2. A 2023–24 estimate cited in an NLP research survey put the figure closer to 47–48 million, including roughly 42 million within Nigeria itself, with smaller established communities in Ghana (about 460,000), Togo (about 117,000), Côte d'Ivoire (about 115,000), and Niger (about 74,800) S1S5. Within Nigeria, Yorùbá speakers are concentrated in the south-western states of Lagos, Ogun, Oyo, Osun, Ondo, and Ekiti, with substantial Yorùbá-speaking populations also in the north-central states of Kwara and Kogi S1. Beyond West Africa, Yorùbá is spoken as a heritage or ritual language by diaspora communities in the United States, the United Kingdom, Brazil, and Cuba, a legacy of the transatlantic slave trade that carried Yorùbá religious vocabulary into Candomblé in Brazil and Santería in Cuba S1. Its status is not limited to Nigeria: Yorùbá is also recognised as an official or national language in Benin and Togo, reflecting the reach of Yoruboid-speaking communities on both sides of Nigeria's western border S1S3
Writing system and orthography history
Yorùbá's Latin-based orthography traces to 1843, when the Reverend Samuel Ajayi Crowther — himself a native Yorùbá speaker recaptured from a slave ship and educated by the Church Missionary Society — published a Yorùbá vocabulary that adapted Roman letters to the language's sounds, including its tones S1. A missionary conference in Lagos in 1875, chaired by Crowther, further standardised spelling conventions, introducing acute and grave accents for tone and subdotted letters such as ẹ, ọ, and ṣ to represent vowel and consonant sounds not distinguished in English S1. The orthography was revised again in 1966 and remains, with further refinement in the 1970s, the basis for standard written Yorùbá today S1. The alphabet omits the letters c, q, v, x, and z and uses the digraph gb for a single consonant sound not found in English S3. Three regional dialect families are usually distinguished — broadly Northwest (around Oyo and Ibadan), Central (around Ife and Ekiti), and Southeast/Southwest varieties — and the Northwest, Oyo-Ibadan-based dialect underlies Standard or Literary Yorùbá, the form taught in schools and used in broadcasting S1S3
Tone, sounds, and grammar
Yorùbá is a tone language with three level tones — low, mid, and high — marked in writing with a grave accent, no mark, and an acute accent respectively; because tone carries meaning, two words spelled identically apart from their tone marks can be entirely unrelated S1S3. The mid tone is conventionally left unmarked in standard orthography, which occasionally creates ambiguity for learners and for text-processing systems built without full diacritic support S1S5. Grammatically, Yorùbá follows a basic subject–verb–object word order, though scholars have noted grammatical traces consistent with an earlier subject–object–verb pattern in some constructions S3. Tense and aspect are expressed through particles that sit between the subject and the verb rather than through changes to the verb's own form, and the language makes extensive use of serial verb constructions, in which two or more verbs are strung together without a conjunction to express what a single verb might express in English S3. This combination of tone, compact grammar, and a rich oral-literature tradition (proverbs, praise poetry, and the Ifá divination corpus) gives Yorùbá its particular expressive range S1
Status and diaspora use
Yorùbá holds official-language status in Nigeria and is recognised in Benin and Togo, and it is taught as a subject in Nigerian primary schools under national language policy, alongside Hausa and Igbo, though enforcement of mother-tongue instruction is inconsistent in practice S2. Outside West Africa, Yorùbá functions less as a language of daily household use and more as what linguists studying diaspora communities describe as a marker of core identity: a 2024 study of first-generation Yorùbá–English bilingual immigrants in the United States, based on interviews and observation in New York, Texas, and Maryland, found that heritage-language maintenance practices were closely tied to how immigrants defined their own identity, extending well beyond simple communication needs S4. Community-run Yorùbá language classes have developed in cities with sizeable Nigerian immigrant populations to support this kind of intergenerational transmission S4. Within Nigeria, ongoing digital and NLP research projects have begun documenting Yorùbá's regional dialects specifically because most existing language technology has so far only served the standard, Oyo-Ibadan-based variety, leaving other dialect communities under-resourced S5