Brazilian Sign Language
{{Short description|Sign language of Brazil}}
{{Redirect|Libras||Libra (disambiguation)}}
{{Infobox language
| name = Brazilian Sign Language
| altname = Libras
| states = Brazil and Brazilian diaspora
| region = Urban areas
| speakers = 630,000
| date = 2021
| ref = e25
| speakers_label = Signers
| familycolor = sign
| family = Language isolate?
| iso3 = bzs
| glotto = braz1236
| glottorefname = Brazilian Sign Language
| ELP = 7003
| ELPname = Língua Brasileira de Sinais
}}
Brazilian Sign Language ({{langx|pt|Língua Brasileira de Sinais}} {{IPA|pt-BR|ˈlĩɡwɐ bɾaziˈlejɾɐ dʒi siˈnajs|}}) is the sign language used by deaf communities of Brazil. It is commonly known in short as Libras ({{IPA|pt-BR|ˈlibɾɐs|pron}}).
Brazilian Sign Language (Libras) is a well-established language and legally recognized.[http://www.libras.org.br/leilibras.htm Libras law] (in Portuguese) {{webarchive|url=https://web.archive.org/web/20050426151659/http://www.libras.org.br/leilibras.htm|date=April 26, 2005}} Several dictionaries, instructional videos, and a number of articles on the linguistic nuances of the language have been published. It is a natural language of Brazil, but it exhibits influences of French Sign Language, therefore sharing similarities with other sign languages across Europe and the Americas. Additionally, Libras has regional dialects across Brazil, reflecting the diverse sociocultural differences in the country.
Recognition and status
Libras is not merely a form of gesturing within the Portuguese language used to communicate; rather, it stands as a distinct language in its own right. Brazilian sign language is a visual-spatial language that combines gestures, facial expression and body language.{{Cite web |last=Cristiano |first=Almir |date=2017-05-17 |title=O que é Libras? |url=https://www.libras.com.br/o-que-e-libras |access-date=2024-04-26 |website=www.libras.com.br |language=pt-br}} Its classification as a language stems primarily from its unique grammatical organization{{Cite web |title=Língua Brasileira de Sinais (Libras) |url=https://brasilescola.uol.com.br/educacao/lingua-brasileira-sinais-libras.htm |access-date=2024-04-26 |website=Brasil Escola |language=pt-br}} which diverges from how Portuguese is structured.
A strong sign language law was passed by the National Congress of Brazil on April 24, 2002.{{Cite web |title=L10436 |url=http://www.planalto.gov.br/ccivil_03/leis/2002/l10436.htm |access-date=2024-04-26 |website=www.planalto.gov.br}} This law formally acknowledged Libras as a language and mandated governmental support and promotion of its usage. Additionally, it stipulated that public institutions and healthcare services must provide appropriate services for deaf individuals.
In addition to being recognized nationally since 2002,[https://web.archive.org/web/20220915024332/https://agenciabrasil.ebc.com.br/geral/noticia/2022-04/lei-que-reconhece-libras-como-lingua-oficial-do-pais-completa-20-anos Lei que institui a Língua Brasileira de Sinais completa 20 anos], Agência Brasil[https://web.archive.org/web/20220915023008/https://www.matadesaojoao.ba.leg.br/institucional/noticias/lei-que-reconhece-libras-como-lingua-oficial-do-pais-completa-20-anos Lei que reconhece Libras como língua oficial do país completa 20 anos], Câmara Municipal de Mata de São João Libras has also gained official status at the municipal and state levels in various regions, including Belo Horizonte,[https://web.archive.org/web/20220915023444/https://www.otempo.com.br/eleicoes/vereadores-aprovam-lei-que-reconhece-libras-como-lingua-oficial-de-bh-1.2732390 Vereadores aprovam lei que reconhece Libras como língua oficial de BH], O Tempo[https://web.archive.org/web/20220915023448/https://www.cmbh.mg.gov.br/comunica%C3%A7%C3%A3o/not%C3%ADcias/2022/09/reconhecimento-oficial-de-libras-pelo-munic%C3%ADpio-%C3%A9-aprovado-em-1%C2%BA-turno Reconhecimento oficial de Libras pelo Município é aprovado em 1º turno], Câmara Municipal de Belo Horizonte{{Cite web |date=2022-09-13 |title=Lei Que Reconhece Libras Como Língua Oficial De BH É Aprovada Na Cámara |url=https://www.sinjus.org.br/lei-que-reconhece-libras-como-lingua-oficial-de-bh-e-aprovada-na-camara/ |access-date=2024-04-26 |website=SINJUS MG |language=pt-BR}} Curitiba,[https://leismunicipais.com.br/a1/pr/c/curitiba/lei-ordinaria/2021/1583/15823/lei-ordinaria-n-15823-2021-reconhece-a-lingua-brasileira-de-sinais-libras-no-municipio-de-curitiba?r=c Lei Nº 15.823, de 06 de abril de 2021], Leis Municipais[https://web.archive.org/web/20220915023918/https://www.curitiba.pr.leg.br/informacao/noticias/cmc-aprova-reconhecimento-da-lingua-brasileira-de-sinais-em-curitiba Aprovado reconhecimento da Língua Brasileira de Sinais em Curitiba] Ouro Preto,[https://web.archive.org/web/20230521234622/https://www.librasol.com.br/aprovado-projeto-de-lei-que-reconhece-oficialmente-a-libras-em-ouro-preto/ Aprovado projeto de Lei que reconhece oficialmente a Libras em Ouro Preto], Librasol[https://web.archive.org/web/20230521234651/https://cmop.mg.gov.br/aprovado-projeto-de-lei-que-reconhece-oficialmente-a-libras-em-ouro-preto/ Aprovado Projeto de Lei que reconhece oficialmente a Libras em Ouro Preto], Câmara Municipal de Ouro Preto[https://web.archive.org/web/20230521235227/https://mundodosinconfidentes.com.br/aprovado-projeto-de-lei-que-reconhece-oficialmente-a-libras-em-ouro-preto/ Aprovado Projeto de Lei que reconhece oficialmente a Libras em Ouro Preto], Mundo dos Inconfidentes[https://web.archive.org/web/20230521235237/https://jornaloespeto.com.br/2022/10/13/aprovado-projeto-de-lei-que-reconhece-oficialmente-a-lingua-brasileira-de-sinais-libras-em-ouro-preto/ Aprovado Projeto de Lei que reconhece oficialmente a Língua Brasileira de Sinais (Libras) em Ouro Preto], O Espeto Salvador,{{Cite web|url=https://leismunicipais.com.br/a/ba/s/salvador/lei-ordinaria/2010/786/7862/lei-ordinaria-n-7862-2010-reconhece-oficialmente-no-municipio-de-salvador-como-meio-de-comunicacao-objetiva-e-de-uso-corrente-a-lingua-brasileira-de-sinais-libras-e-dispoe-sobre-a-sua-implantacao-como-segunda-lingua-oficial-para-surdos-na-rede-publica-municipal-de-ensino|title=Lei Ordinária 7862 2010 de Salvador BA|website=leismunicipais.com.br}} Rondonia,{{Cite web |last1=Rondônia |first1=Governo do Estado de |last2=Fortini |first2=Andréia |date=2023-07-26 |title=Governo de Rondônia reconhece oficialmente a Língua Brasileira dos Sinais |url=https://rondonia.ro.gov.br/governo-de-rondonia-reconhece-oficialmente-a-lingua-brasileira-dos-sinais/ |access-date=2024-04-26 |website=Governo do Estado de Rondônia |language=pt-BR}} and Mato Grosso.{{Cite web |title=A Libras agora é lei em Mato Grosso |url=https://www.al.mt.gov.br/midia/texto/a-libras-agora-e-lei-em-mato-grosso/visualizar |access-date=2024-04-26 |website=www.al.mt.gov.br}}
In Rio de Janeiro, the teaching of Libras was made official in the curriculum of the municipal school system.[https://web.archive.org/web/20220915024920/http://www.camara.rio/comunicacao/noticias/1104-agora-e-lei-escolas-da-rede-municipal-terao-ensino-de-libras Agora é lei: Escolas da rede municipal terão ensino de Libras][http://aplicnt.camara.rj.gov.br/APL/Legislativos/contlei.nsf/7cb7d306c2b748cb0325796000610ad8/17a7e46caf8c34aa0325885300478a93?OpenDocument Lei nº 7391/2022, de 31 de maio de 2022]
Recognizing the importance of Libras, April 24 has been designated as the National Day of Brazilian Sign Language (Libras).[https://web.archive.org/web/20220915030144/https://www12.senado.leg.br/radio/1/noticia/2022/04/20/24-de-abril-e-o-dia-nacional-da-lingua-brasileira-de-sinais 24 de abril é o Dia Nacional da Língua Brasileira de Sinais][https://web.archive.org/web/20220915030559/https://www.camara.leg.br/noticias/448039-comunidade-surda-comemora-sancao-do-dia-nacional-da-libras/ Comunidade surda comemora sansão do Dia Nacional da Libras][https://web.archive.org/web/20220915030555/https://www.altafloresta.mt.leg.br/imprensa/noticias/24-de-abril-dia-nacional-da-lingua-brasileira-de-sinais-1 24 de abril - Dia Nacional da Língua Brasileira de Sinais]
Educational approaches have shifted from oralism to Total Communication and bilingualism.
History
Brazilian Sign Language was greatly influenced by French Sign Language.Goldfeld, Marcia. A criança surda: linguagem e cognição numa perspectiva sociointeracionista. 6° ed. São Paulo: Plexus, 2002, 172 p. In 1855, the arrival of a deaf French teacher named Ernest Huet marked a pivotal moment in Libras' history. Huet, supported by the former Brazilian emperor Dom Pedro II, embarked on a mission to establish the first school for the deaf in Brazil.
File:Ernest Huet acabou de chegar no mexico.jpg
Huet was part of a noble family in France and possessed a multilingual background, proficient in Portuguese, German, and French from an early age. However, at the age of 12 he acquired measles which resulted in him becoming deaf. Undeterred by his condition, Huet continued his education, mastering Spanish and enrolling in the National Institute for the Deaf in Paris. In 1855, he relocated to Brazil with his wife, where his encounter with the deaf community led him to play a pivotal role in the development of Libras. Huet aided in the creation of the first public school for the deaf in Brazil, located in Rio de Janeiro and due to his contact with deaf individuals in Brazil he became a key person in the development of Libras.http://www.libras.ufsc.br/colecaoLetrasLibras/eixoFormacaoEspecifica/historiaDaEducacaoDeSurdos/assets/258/TextoBase_HistoriaEducacaoSurdos.pdf {{Bare URL PDF|date=August 2024}}{{Cite journal |last=Menezes |first=Ronny Diogenes |date=2019-04-01 |title=LIBRAS: uma reflexão a respeito do histórico de uso do termo |url=https://www.revistas.udesc.br/index.php/arteinclusao/article/view/11525 |journal=Revista Educação, Artes e Inclusão |language=pt |volume=15 |issue=2 |pages=125–144 |doi=10.5965/1984317815022019125 |issn=1984-3178|doi-access=free }}{{Cite web |date=2019-12-23 |title=Primeira Escola de Surdos no Brasil 1857 (INES) |url=https://academiadelibras.com/blog/primeira-escola-de-surdos-no-brasil-1857/ |access-date=2024-04-28 |website=Academia de Libras |language=pt-BR}}
The first public school for the deaf was established in Rio de Janeiro in 1857 and marked a significant milestone. Initially named the Imperial Institute of the Deaf-Mute ({{Langx|pt|Imperial Instituto de Surdos-Mudos}} {{IPA|pt-BR|ĩpeɾiˈaw ĩstʃiˈtutu dʒi ˈsuɾduz ˈmudus|}}) due to people at the time associating being deaf with the inability to speak, the school was later renamed the National Institute of Deaf Education ({{Langx|pt|Instituto Nacional de Educação de Surdos}} {{IPA|pt-BR|ĩstʃiˈtutu nasi.oˈnaw dʒ(i) edukaˈsɐ̃w dʒi ˈsuʁdus|}}; [https://www.gov.br/ines/pt-br INES]). Serving as a beacon of reference for the country, INES catalyzed the formation of additional schools for the deaf and contributed to the consolidation of Libras.
The emergence of tangible resources supporting sign language in Brazil can be traced back to 1875 with the publication of the first Brazilian Sign Language dictionary, "Iconografia dos Signaes dos Surdos-Mudos," authored by Flausino José da Costa Gama, an INES student.{{Cite journal |last1=Sofiato |first1=Cássia Geciauskas |last2=Reily |first2=Lucia |date=December 2012 |title=Justaposições: o primeiro dicionário brasileiro de língua de sinais e a obra francesa que serviu de matriz |journal=Revista Brasileira de Educação Especial |language=pt |volume=18 |issue=4 |pages=569–586 |doi=10.1590/S1413-65382012000400003 |issn=1413-6538|doi-access=free }}
However, despite these advancements in sign language, a prevalent medical perspective persisted, leading to the institutionalization of deaf individuals in hopes of finding a cure.Strobel, K. História da educação de surdos. UFSC. Licenciatura em Letras-Libras na Modalidade a distância. Florianópolis 2009. Disponível em: . Accessed on: 22 April 2024.Diniz, D. O que é deficiência. São Paulo: Brasiliense, 2007 This medical model gained traction, particularly following the Milan Conference of 1880, where a resolution against the use of sign language in education was passed, favoring oralism. Oralism gained prominence in Brazil from 1911 onwards, and the INES superintendent, Ana Rímoli de Faria Doria, endorsed oralism in the institute by separating older deaf individual from younger ones to discourage sign language use.Gesser, Audrei. Libras? Que língua é essa? Crenças e preconceitos em torno da língua de sinais e da realidade surda. São Paulo: Parábola Editoral, 2009, 87 p.{{Cite journal |last1=Herold Junior |first1=Carlos |last2=Cardoso |first2=Luana da Luz |date=2016-10-30 |title=Educação e surdez na década de 1950 no Brasil: Um panorama histórico acerca de Ana Rímoli de Faria Dória |url=http://periodicos.sbu.unicamp.br/ojs/index.php/histedbr/article/view/8645139 |journal=Revista HistedBR On-line |volume=16 |issue=68 |pages=138 |doi=10.20396/rho.v16i68.8645139 |issn=1676-2584|doi-access=free }}
Despite the imposition of oralism and the ban on sign language in schools, many deaf individuals in Brazil continued to resist and advocate for the recognition of their language and culture. It wasn't until 2002 that Libras gained legal recognition as a means of communication and expression, thanks to a law passed by Congress, marking a significant victory for the deaf community in Brazil.
Deaf and sign language organizations
File:Logo Feneis – Federação Nacional de Educação e Integração dos Surdos.png
The National Federation of Education and Integration of the Hearing Impaired ({{Langx|pt|Federação Nacional de Educação e Integração do Deficiente Auditivo}}) (FENEIDA) was founded in Rio de Janeiro in 1977 by hearing individuals with an interest in the deaf community.RAMOS, Clélia Regina. In: Histórico da FENEIS até o ano de 1988. Editora Arara Azul, 2004 FENEIDA later had an increased participation from deaf individuals, marking a pivotal shift towards advocating for their rights within the organization.
In 1987, FENEIDA was dissolved through a vote to pave the way for a new federation. The idea for a new federation was proposed by deaf individuals and was named The National Federation of Deaf Education and Integration ({{Langx|pt|Federação Nacional de Educação e Integração dos Surdos}}) ([https://brazilfoundation.org/en/project/federacao-nacional-de-educacao-e-integracao-dos-surdos-feneis-national-federation-of-education-and-integration-of-the-deaf/ FENEIS]). Initially overseen by hearing individuals, FENEIS gradually transitioned to a more inclusive leadership structure. By 1998, the organization boasted a representation of eleven deaf members alongside three hearing individuals.
FENEIS is known as a nonprofit institution dedicated to advocating for the educational, cultural, and social rights of the deaf community. Through its proactive efforts, FENEIS has significantly advanced the legal and societal standing of deaf individuals. Notably, its impact extends beyond advocacy, encompassing direct engagement in educational initiatives, cultural promotion, and social services.
Additionally, FENEIS has a number of regional locations in Brasilia, Sao Paulo, Belo Horizonte, Fortaleza, Curitiba, Manaus, Caxias do Sul and Porto Alegre, further amplifying its reach and impact across Brazil.
Phonology
William Stoke proposed that sign language exhibits small units of speech, akin to the phonemes found in spoken languages.{{Citation |last=Sandler |first=W. |title=Sign Language: Overview |date=2006 |encyclopedia=Encyclopedia of Language & Linguistics |pages=328–338 |url=http://dx.doi.org/10.1016/b0-08-044854-2/00239-x |access-date=2024-04-29 |publisher=Elsevier |doi=10.1016/b0-08-044854-2/00239-x |isbn=978-0-08-044854-1|url-access=subscription }} In Brazilian Sign Language (Libras), these units are organized according to five parameters studied within phonology. These parameters encompass handshape, location, movement, palm orientation, and non-manual markers.
Handshape refers to the specific configuration of the hand while forming a sign. For instance, in 2012, Madson and Raquel Barreto compiled an inventory comprising 111 distinct handshapes.BARRETO, M.; BARRETO, R. Escrita de sinais sem mistérios. Belo Horizonte: Edição do autor, 2012 Location denotes where the hand is positioned in space or what it touches during sign production. Barros identified a total of 35 points where the hand can touch or be positioned during the articulation of a sign.BARROS, M. E. De. ELiS: Sistema brasileiro de Escrita das línguas de sinais. Porto Alegro: Penso,2015. Movement encompasses any motions accompanying a sign, involving the hands, arms, or body. Palm orientation delineates the various directions the palm may face while producing a sign. Lastly, non-manual markers entail facial expressions that can accentuate or alter the meaning of a sign. Much like phonemes in spoken language, these parameters play a pivotal role in sign meaning. Any alteration in these parameters can result in a significant shift in the sign's meaning.
Fingerspelling
In Brazilian Sign Language (Libras), signs typically represent specific words used in communication. However, when a particular word lacks a designated sign, fingerspelling becomes necessary. Fingerspelling involves manually spelling out words using the letters of the Libras alphabet.
Libras fingerspelling uses a one-handed manual alphabet similar to that used by the French Sign Language family.{{Cite web |url=http://www.libras.org.br/Thumbnails/FrameSet.htm |title=Libras manual alphabet |access-date=2005-12-26 |archive-date=2006-02-07 |archive-url=https://web.archive.org/web/20060207165026/http://www.libras.org.br/Thumbnails/FrameSet.htm |url-status=dead }} This method allows individuals to convey words for which there are no existing signs, enabling effective communication across a wide range of concepts and contexts.
Regional Variation
Just like spoken language, Libras, used within the deaf community in Brazil, exhibits regional and generational variations in its signs. Different signs may denote places, objects, and concepts, and these signs may evolve over time with new generations. These changes underscore the dynamic nature of language. Professor Rimar Segala from the Federal University of Sao Carlos notes that this "variation is evidence of the vitality of the language."{{Cite web |date=2021-01-14 |title=Língua Brasileira de Sinais pode variar conforme regionalismos |url=https://www.educacao.sp.gov.br/lingua-brasileira-de-sinais-pode-variar-conforme-regionalismos/ |access-date=2024-04-29 |website=Secretaria da Educação do Estado de São Paulo |language=pt-BR}}
For example, in Sao Paulo, the sign for beer involves a twist with the fist, whereas in Minas Gerais, beer is represented by touching the side of the face with the pointer and middle fingers.{{Cite web |title=Oficial para comunidade surda, Língua Brasileira de Sinais tem diferentes 'sotaques' pelo País |url=https://www.estadao.com.br/educacao/oficial-para-comunidade-surda-lingua-brasileira-de-sinais-tem-diferentes-sotaques-pelo-pais/ |access-date=2024-04-29 |website=Estadão |language=pt-br}}
Ronice Müller de Quadros and her colleagues developed the [https://signbank.libras.ufsc.br/pt/about Libras SignBank], a valuable resource enabling users to access hundreds of Libras signs. It facilitates searches for signs based on Portuguese equivalents, handshapes, associated word categories, phonology, or syntax. Additionally, the SignBank enables users to explore regional variations of signs, offering a deeper understanding of the linguistic diversity within Libras.{{Cite web |title=signbank |url=https://signbank.libras.ufsc.br/pt/about |access-date=2024-04-29 |website=signbank |language=pt}}
Writing
Sutton SignWriting is the dominant writing system in Brazil.{{cite journal|last1= Costa|first1=Edivaldo da Silva|date= 2018|title=Tendências atuais da pesquisa em escrita de sinais no Brasil |journal=Revista Diálogos (RevDia) |volume=6|issue=1|pages= 23–41 |issn=2319-0825}} A master's in linguistics dissertation titled "A arte de escrever em Libras" by Gabriela Otaviani Barbosa found that SignWriting is used in 18 Federal Universities and in 12 public schools in Brazil.{{Cite journal |last=Barbosa |first=Gabriela Otaviani |date=2017 |title=A arte de escrever em libras |url=https://repositorio.ufsc.br/handle/123456789/177791 |journal=UFSC}}{{Cite web |title=A vida em Libras – Signwriting – Escrita de Sinais |url= http://tvines.ines.gov.br/?p=16704 |website=TV Ines}}
Historical efforts were commonly transcribed using Portuguese words, written in upper case, to stand for each equivalent Libras morpheme.{{cite journal|last1= Paiva|first1=Francisco Aulísio dos Santos|last2=De Martino|first2=José Mario|last3=Barbosa|first3=Plínio Almeida|last4=Benetti|first4=Ângelo|last5=Silva|first5=Ivani Rodrigues|date=2016|title=Um sistema de transcrição para língua de sinais brasileira: o caso de um avatar|journal=Revista do GEL|volume=13|issue=3|pages=13, 21–24|doi= 10.21165/gel.v13i3.1440|doi-access= free}}File:Escola Estadual de Educação Especial Dr. Reinaldo Fernando Cóser 02.jpgTranscription of Libras signs using SignWriting has been in place since at least 1997 with the SignNet Project in Porto Alegre and Fernando Capovilla's dictionaries in São Paulo. The University of Santa Catarina at Florianopolis (UFSC) has required courses in SignWriting as the preferred form of LIBRAS transcription.
SignWriting is cited as being useful in the pedagogy of young children.{{Cite journal |title= Aquisição da Escrita de Sinais por Crianças Surdas através de ambientes digitais |url= http://www.signwriting.org/archive/docs6/sw0580_BR_Aquisicao_Escrita_Sinais_2007.pdf |journal= Sign Writing}}
The Federal University of Santa Catarina has accepted a dissertation written in Brazilian Sign Language using Sutton SignWriting for a master's degree in linguistics. The dissertation "A escrita de expressões não manuais gramaticais em sentenças da Libras pelo Sistema signwriting" by João Paulo Ampessan states that "the data indicate the need for [non-manual expressions] usage in writing sign language".{{Cite journal |last= Ampessan |first=João Paulo |title=A escrita de expressões não manuais gramaticais em sentenças da Libras pelo sistema Signwriting |url= https://repositorio.ufsc.br/bitstream/handle/123456789/180688/351070.pdf?sequence=1&isAllowed=y |journal=Repositório UFSC}}
In film
In September 2017, new Libras accessibility requirements took effect in Brazil mandating availability of Brazilian Sign Language for films shown in Brazilian movie theaters. Sign language is displayed to moviegoers on a second screen device.{{Cite web |title=Accessibility & The Audio Track File |url=https://cinepedia.com/accessibility/accessibility-the-audio-track-file/ |access-date=14 November 2023 |website=Cinepedia}} Sign language is stored as a Sign Language Video track in the Digital Cinema Package (DCP), synchronized with the rest of the film.{{Cite web |date=18 Sep 2017 |title=Deluxe Launches First Brazilian Sign Language (LIBRAS) Localization Service Outside Brazil |url=https://www.prnewswire.com/news-releases/deluxe-launches-first-brazilian-sign-language-libras-localization-service-outside-brazil-300521137.html |access-date=14 Nov 2023 |website=Cision PR Newswire |publisher=Deluxe Entertainment Services Group Inc. through Cision PR Newswire}} Sign Language Video tracks have no audio and are encoded as a VP9-compressed video encoded in PCM audio stored in Sound Track 15 of the DCP.{{Cite web |date=2018-03-29 |title=Recommended Guidelines for Digital Cinema Source and DCP Content Delivery |url=http://www.deluxecdn.com/dcinema/support/Deluxe_Technicolor_Source_Delivery_Guidelines_1.0.pdf |access-date=2023-11-14 |publisher=Deluxe Technicolor Digital Cinema}}
Classification
Wittmann (1991)Wittmann, Henri (1991). "[http://www.nou-la.org/ling/1991a-class.pdf Classification linguistique des langues signées non vocalement]." Revue québécoise de linguistique théorique et appliquée 10:1.215–88. posits that Brazilian Sign Language is a language isolate (a 'prototype' sign language), though one developed through stimulus diffusion from an existing sign language, likely Portuguese Sign Language and/or French Sign Language.
See also
- Ka'apor Sign Language, an unrelated Indigenous sign language of Brazil.
Footnotes
{{Reflist}}
References
{{refbegin|indent=yes}}
- {{cite book
|language=pt
|last=da Gama |first=Flausine José
|year=1875
|title=Iconographia dos Signaes dos Surdos-Mudos
|trans-title=Iconography of Signs for the Deaf-Mute
|location=Rio de Janeiro
}}
- {{cite book
|language=pt
|editor-last1=Capovilla |editor-first1=F. C.
|editor-last2=Raphael |editor-first2=W. D.
|year=2001
|title=Dicionário enciclopédico ilustrado trilíngüe da Língua de Sinais Brasileira
|trans-title=Trilingual illustrated encyclopedic dictionary of Brazilian Sign Language
|location=São Paulo
|publisher=Edusp, FAPESP, Fundação Vitae, Feneis, Brasil Telecom
}} Volume 1: {{ISBN|85-314-0600-5}} Volume 2: {{ISBN|85-314-0603-X}}
- {{cite thesis
|last=de Souza |first=Guilherme Lourenco
|year=2018
|title=Verb agreement in Brazilian Sign Language: morphophonology, syntax & semantics
|type=doctoral dissertation
|publisher=Universidade Federal de Minas Gerais
}}
- {{cite journal
|last=Lourenço |first=Guilherme
|year=2019
|title=Verb agreement in Brazilian Sign Language: Morphophonology, syntax & semantics
|journal=Sign Language & Linguistics
|volume=22 |number=2 |pages=275–281
|doi=10.1075/sll.00036.lou
}}
- QUADROS, R. M.; KARNOPP, L. B. Língua de sinais brasileira: estudos linguísticos. Porto Alegre: Artemed, 2004.
- {{cite journal
|first1=André Nogueira |last1=Xavier
|first2=Sherman |last2=Wilcox
|year=2014
|title=Necessity and possibility modals in Brazilian Sign Language (Libras)
|journal=Linguistic Typology
|volume=18 |number=3 |pages=449–488
|doi=10.1515/lingty-2014-0019
|id={{ResearchGatePub|275950569}} {{free access}}
}}
{{refend}}
{{Incubator|bzs}}
{{sign language navigation}}
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Category:Sign language isolates
Category:Language isolates of South America