• In the language itself: Irish Sign Language (English) ^{1) 2)} or Teanga Chomharthaíochta na hÉireann (Gaeilge/Irish) ^{3) 4)}
• ISO 639-3 standard: isg

• Classification: Sign Language → French Sign Language or Francosign Family (LSF). For more information, see Irish Sign Language at Glottolog.
• Script: No script.

There is no script, therefore there is no standardized orthography.

Irish Sign Language (ISL) is used scattered throughout the Republic of Ireland but also in parts of Northern Ireland in the United Kingdom. In Northern Ireland both Irish Sign Language and British sign Language are used. ^{5) 6)} Gender-based dialectal differences existed as a result of separate schools for boys and girls. Though Ethnologue claims this difference has lessened over time, other research shows that it is still present. ⁷⁾⁸⁾⁹⁾

There are several estimations of speaker numbers according to different sources:

• According to Leeson and Saeed (2012) there are around 6,500 Deaf people across the island of Ireland who use ISL and around 65,000 hearing signers.¹⁰⁾
• According to the Irish Deaf Society, there are 5.000 Deaf people with ISL as first language and 40.000 hearing signers of ISL ¹¹⁾
• According to Ethnologue, there are 21.050 signers of ISL.¹²⁾

In 1816, the first school for the deaf in Ireland was founded by Dr. Charles Orpen. ¹³⁾ Orpen also established the National Institution for the Education of the Deaf in Ireland. In the period of 1816 to 1849, nine institutes for the education of the deaf were established, even though two of them closed down in a short period of time. ¹⁴⁾ Most of these Deaf institutions were divided per gender, meaning there were boys-only and girls-only schools, and this resulted in a gendered sign language. ¹⁵⁾ As a result of the established deaf institutes, more Deaf people were brought together. They mostly communicated through the use of sign language, and because of this the Deaf community and the use of Irish Sign Language grew in Ireland. ¹⁶⁾

All Irish institutions used a manual system of instruction. ¹⁷⁾ However, from 1887 the Claremont Institute changed to an oral system of instruction. From 1940, more oralist approaches were used in Deaf education in Ireland following the oralist policies used in Deaf instutions in the Netherlands, Belgium and France. Oral instruction was not seen as a problem by the Deaf community. However, with the implementation of oralist approaches the use of sign language was forbidden and as a result Irish Sign Language became suppressed and frowned upon. ¹⁸⁾

In 1972, the Advisory Committee on the “Education of Children who are Handicapped by Impaired Hearing” ratified the philosophy of strict segregation and oralist approaches. ¹⁹⁾ Families were advised to not sign in their home and because of this a few generations who could not effectively communicate were generated. ²⁰⁾ From 1990, the Irish government policy recommends bilingual education of English and Irish Sign Language and Irish Sign Language is now seen as the language to educational success for deaf people. ^{21) 22)}

On June 17, 1988, the European Parliament signed the Resolution on Sign Languages 1988 in which it asks member countries to recognize their national sign languages as official languages. ^{23) 24)}. Ten years later in 1998, the Resolution on Sign Languages 1998 followed.

Irish Sign Language is not protected by the European Charter for Regional or Minority Languages (1992), as Ireland has not signed nor ratified the Charter. Moreover, sign languages are not explicitly protected by the Charter.

The Convention on the Rights of Persons with Disabilities (2006) is the first international human rights convention that explicitly considers sign languages to be languages (Article 21)²⁵⁾. This Convention is signed (2007) and ratified (2018) by Ireland ²⁶⁾ One of the results of the UN Convention is that the learning of sign languages should be facilitated by state parties. Next to this, sign languages should also be recognized and supported by state parties.

Irish Sign Language was officially recognized in 2017 with the Irish Sign Language Act of 2017. The Act (section 3) states:

• The State recognises the right of Irish Sign Language users to use Irish Sign Language as their native language and the corresponding duty on all public bodies to provide Irish Sign Language users with free interpretation when availing of or seeking to access statutory entitlements and services.
• The community of persons using Irish Sign Language shall have the right to use, develop and preserve Irish Sign Language.

For education (section 5), the Act provides provision for ISL classes, ISL support, ISL teacher training and educational support services.

In the Education Act 1998 it is stated that support services for persons with a disability or other special educational needs include the use of Irish Sign Language or other sign languages and interpreting services. How these support services are to be fulfilled is not specified in the act. It is also not explicitly mentioned that using Irish Sign Language is compulsory.

The Disability Act 2005 amends to the Broadcasting Act 2001 and, as a result, each broadcaster must provide access to material through sign language. ²⁷⁾

The Irish Sign Language (ISL) Tuition Scheme: provides funding for weekly tuition service at home for training in ISL for the child, parent(s)/ guardian(s), and sibling(s).

Since 2019, there is a Bachelor of Education - Irish Sign Language, offered by Dublin City University:

The Centre for Deaf Studies: is based in Trinity College, Dublin, and aims to increase the number of Irish Sign Language/English interpreters with professional training. The centre is also involved in research about Deaf education, interpreting services in the mid-west region, digital material for teaching Irish Sign Language and e-learning. Also, they helped creating the Signs of Ireland Corpus. ²⁸⁾

There is one ISL pre-school:

• The Mid-West School for the Hearing Impaired, based in Limerick.

Other form of pre-school support is the Irish Sign Language (ISL) Tuition Scheme.

In total, there are three Deaf schools in Ireland that offer primary and post-primary education.

The Catholic Institute for Deaf People (CIPD) is a non-profit organisation enabling services to the Deaf community. This organisation is associated with two Deaf schools in Cabra:

• St. Joseph's Residence for Deaf Boys
• St. Mary's Residence for Deaf Girls.

In 2015, the CIPD merged the schools for the boys and the girls into the Holy Family School for the Deaf starting from primary level. ²⁹⁾ They offer the same classes that are available in mainstream schools but with Irish Sign Language to support language acquisition. These are boarding schools, students stay here during the week and visit their parents during weekends and vacations.

The Mid-West School for the Deaf in Limerick offers primary and post-primary education through sign language or orally.

The school offers the same classes that are available in mainstream schools but with Irish Sign Language to support language acquisition. This is not a boarding school, students travel daily to follow classes here.

In these three Deaf schools Irish Sign Language is prevalent and used throughout pre-school to secondary education. Next to Irish Sign Language they also learn English and the oral method is also used. The schools get subsidized by the Irish government. The children enrolled in these schools are likely to use Irish Sign Language outside school. ^{30) 31) 32)}

Parents also have the option to send their children to a mainstream school. In any mainstream school, resources are provided based on the individual needs of the child. ³³⁾ There are also mainstream schools where there are more classes or resources for Deaf or Hard of Hearing Children. ³⁴⁾ In these situations, Irish Sign Language classes are limited and the amount differs per school.

Trinity College Dublin offers a Bachelor in Deaf Studies which focuses on the Deaf community and the Irish Sign Language. Later on in the programme there is a focus on Irish Sign Language teaching or Irish Sign Language interpreting. For this programme, no prior knowledge of Irish Sign Language is needed. The Bachelor in Deaf Studies “strongly encourage[s] applications from Deaf and hard of hearing students”. ³⁵⁾

• Irish Deaf Society: offers free Irish Sign Language classes for deaf adults. They also offer paid classes.
• The Irish Deaf: offers paid Irish Sign Language Classes.
• Deaf Village Ireland: contains several Deaf organisations that offers a range of facilities including Irish Sign Language classes.

• Sharing the Journey is a mobile app on which you can look up signs and learn Irish Sign Language.
• Concise Irish Sign Language is a concise Irish Sign Language video dictionary containing approximately 1000 signs.
• Basic Sign Language Lessons: DITSgnLanguageSoc youtube channel with lessons in numbers, words, and basic phrases.