Languages attested from the 19th century

Santali (ᱥᱟᱱᱛᱟᱲᱤ, সাঁওতালি, ସାନ୍ତାଳୀ, सान्ताली) is a Kherwarian Munda language spoken natively by the Santal people of South Asia. It is the most widely-spoken language of the Munda subfamily of the Austroasiatic languages, related to Ho and Mundari, spoken mainly in the Indian states of Assam, Bihar, Jharkhand, Mizoram, Odisha, Tripura and West Bengal. It is a recognised regional language of India as per the Eighth Schedule of the Indian Constitution. It is spoken by around 7.6 million people in India, Bangladesh, Bhutan and Nepal, making it the third most-spoken Austroasiatic language after Vietnamese and Khmer.

Abkhaz, also known as Abkhazian, is a Northwest Caucasian language most closely related to Abaza. It is spoken mostly by the Abkhaz people. It is one of the official languages of Abkhazia, where around 190,000 people speak it. Furthermore, it is spoken by thousands of members of the Abkhazian diaspora in Turkey, Georgia's autonomous republic of Adjara, Syria, Jordan, and several Western countries. 27 October is the day of the Abkhazian language in Georgia.

New Zealand English (NZE) is the variant of the English language spoken and written by most English-speaking New Zealanders. Its language code in ISO and Internet standards is en-NZ. It is the first language of the majority of the population.

Chinook Jargon (Chinuk Wawa or Chinook Wawa, also known simply as Chinook or Jargon) is a language originating as a pidgin trade language in the Pacific Northwest. It spread during the 19th century from the lower Columbia River, first to other areas in modern Oregon and Washington, then to British Columbia and parts of Alaska, Northern California, Idaho and Montana. It sometimes took on the characteristics of a creole language. The contact language Chinook Jargon should not be confused with the Indigenous language Chinook.

Demotic Greek (Greek: Δημοτική Γλώσσα, Dimotikí Glóssa, lit. 'language of the people') is the standard spoken language of Greece in modern times and, since the resolution of the Greek language question in 1976, the official language of Greece. "Demotic Greek" (with a capital D) contrasts with the conservative Katharevousa, which was used in formal settings, during the same period. In that context, Demotic Greek describes the specific non-standardized vernacular forms of Greek used by the vast majority of Greeks during the 19th and 20th centuries.

Katharevousa (Greek: Καθαρεύουσα, literally "purifying [language]") is a conservative form of the Modern Greek language conceived in the late 18th century as both a literary language and a compromise between Ancient Greek and the contemporary vernacular, Demotic Greek. Originally, it was widely used for both literary and official purposes, though sparingly in daily language. In the 20th century, it was increasingly adopted for official and formal purposes, until minister of education Georgios Rallis made Demotic Greek the official language of Greece in 1976, and in 1982 Prime Minister Andreas Papandreou abolished the polytonic system of writing for both Demotic and Katharevousa.

Yurí (Jurí) is, or was, a language previously spoken near a stretch of the Caquetá River in the Brazilian Amazon, extending slightly into Colombia. It was spoken on the Puré River of Colombia, and the Içá River and Japurá River of Brazil.

American Sign Language (ASL) is a natural language that serves as the predominant sign language of Deaf communities in the United States and most of Anglophone Canada. ASL is a complete and organized visual language that is expressed by employing both manual and nonmanual features. Besides North America, dialects of ASL and ASL-based creoles are used in many countries around the world, including much of West Africa and parts of Southeast Asia. ASL is also widely learned as a second language, serving as a lingua franca. ASL is most closely related to French Sign Language (LSF). It has been proposed that ASL is a creole language of LSF, although ASL shows features atypical of creole languages, such as agglutinative morphology.

Black American Sign Language (BASL) or Black Sign Variation (BSV) is a dialect of American Sign Language (ASL) used most commonly by deaf African Americans in the United States. The divergence from ASL was influenced largely by the segregation of schools in the American South. Like other schools at the time, schools for the deaf were segregated based upon race, creating two language communities among deaf signers: black deaf signers at black schools and white deaf signers at white schools. As of the mid 2010s, BASL is still used by signers in the South despite public schools having been legally desegregated since 1954.