Question: Where was the unclassified language of the people who were sometimes referred to as Cocos heard?

full_context: Document 1: Apache: The Apache ( ; ] ) are culturally related Native American tribes from the Southwestern United States, and have traditionally lived in Eastern Arizona, Northern Mexico (Sonora and Chihuahua), New Mexico, West Texas, and Southern Colorado. These areas are collectively known as Apacheria. Their collective homelands consist of high mountains, sheltered and watered valleys, deep canyons, deserts, and the southern Great Plains. The Apache tribes fought the invading Spanish and Mexican peoples for centuries. The first Apache raids on Sonora appear to have taken place during the late 17th century. In 19th-century confrontations during the American-Indian wars, the U.S. Army found the Apache to be fierce warriors and skillful strategists.
Document 2: Kaurna language: Kaurna ( or ) is a Pama-Nyungan language historically spoken by the Kaurna peoples of the Adelaide Plains of South Australia. The people of the Adelaide plains are known as the Kaurna people in contemporary times, but the Kaurna nation is made up of various tribal clan groups, each with their own "parnkarra" district of land, each having had their own dialectal form of language. These dialects were historically spoken in the area of the Adelaide Plains bounded by Crystal Brook and Clare in the north, Cape Jervis in the south, and just over the Mount Lofty ranges. It ceased to be spoken on an everyday basis in the 19th century, but, in a process that began in the 1990s, is being reclaimed and re-introduced.
Document 3: Carreras, Durango: My grandparents moved from Carreras to Guzman Y Hernandez (La Noria) in 1952. Jesus Alarcon Saucedo and Pascuala Nevarez Alvarez. Those were bad years for land-plowing (no rain) and several families moved out. One thing of note is that unlike other pueblos in Mexico, the people from Carreras kept their traditions that they brought from Spain intact and they have an accent that distinguishes them from other towns.
Document 4: Coixcas: Coixcas describes a pre-conquest community, and its inhabitants, located between the modern Mexican towns of Tixtla and Apango. The Coixcas people resisted and repulsed attempts by the Aztecs to conquer their community. The area was later captured by the Spanish conquistadores.
Document 5: Coree: The Coree (also Connamox, Cores, Corennines, Connamocksocks, Coranine Indians, Neuse River Indians) were a very small Native American tribe, who once occupied a coastal area south of the Neuse River in southeastern North Carolina in the area now covered by Carteret and Craven counties. Early 20th-century scholars were unsure of what language they spoke, but the coastal areas were mostly populated by Iroquois and Algonquian peoples.
Document 6: Tejano: The Tejano ] (Spanish for "Texan") are residents of the state of Texas who are culturally descended from the original Spanish-speaking settlers of Texas and northern Mexico. They may be variously of Criollo Spanish or Mexican American heritage, but may not necessarily be directly descended from the original settlers.
Document 7: Native Americans in the United States: In the United States of America, Native Americans (also known as American Indians, Indigenous Americans or simply Indians; see §Terminology differences) are people who belong to one of the over 500 distinct Native American tribes that survive intact today as partially sovereign nations within the country's modern boundaries. These tribes and bands are descended from the pre-Columbian indigenous population of North America.
Document 8: Catuquinaru language: Catuquinarú is the extinct and unclassified language of the Catuquinaru tribe of Brazil, preserved in a few words collected by Jose Bach and published by G. E. Church in 1898. The name is a common derivative of "Catuquina". Loukotka includes it among the Tupi languages, describing the people as Tupinized Catuquina. However, the little preserved vocabulary does not resemble that of the Tupi languages, Catuquinan languages, or Panoan languages (compare Panoan Catuquina).
Document 9: Cherokee Nation of Mexico: The Cherokee Nation of Mexico, also known as the Cherokee Nation of Sequoyah of Mexico, Texas, and U.S.A. Reservation and Church is an organization of individuals who claim descent from Cherokee people who migrated to Mexico in the 19th century. They are an unrecognized tribe with a presence in Zaragoza, Coahuila, Mexico. According to Robert J. Conley, the Cherokee Nation of Mexico is recognized by the state of Coahuilla; however, according to the Instituto Nacional de Lenguas Indígenas, which manages the official surveys of indigenous groups in Mexico, the only indigenous peoples in Coahuila are the Kickapoo people.
Document 10: Karankawa people: Karankawa (also Karankawan, Comanches, Cocos, and called in their language Auia) are a tribe of Native Americans, now a restored nation, who played a pivotal part in early Texas history.
Document 11: Kambiwá language: Kambiwá a.k.a. Cambioá is an extinct unclassified language of Brazil. A couple dozen words were collected from two people in the 1960s, but by that time no-one spoke the language any longer. Apart from two apparent borrowings, none of the words are relatable to known languages. Loukotka (1968) characterized the language as unclassifiable due to lack of data.
Document 12: Kickapoo people: The Kickapoo people (Kickapoo: Kiikaapoa or Kiikaapoi) are an Algonquian-speaking Native American and Indigenous Mexican tribe. "Anishinaabeg" say the name "Kickapoo" ("Giiwigaabaw" in the Anishinaabe language and its Kickapoo cognate "Kiwikapawa") means "Stands here and there," which may have referred to the tribe's migratory patterns. The name can also mean "wanderer". This interpretation is contested and generally believed to be a folk etymology.
Document 13: Tataviam language: The Tataviam language was spoken by the Tataviam people of the upper Santa Clara River basin, Santa Susana Mountains, and Sierra Pelona Mountains in southern California. It had become extinct by 1916 and is known only from a few early records, notably a few words recorded by Alfred L. Kroeber and John P. Harrington in the early decades of the 20th century. These word lists were not from native speakers, but from the children of the last speakers who remembered a few words and phrases.
Document 14: Karankawa language: Karankawa is the extinct, unclassified language of the Texas coast, where the Karankawa people migrated between the mainland and the . It was not closely related to other known languages in the area, much of which are also poorly attested, and may have been a language isolate. A couple hundred words are preserved, collected in 1698, 1720, and 1828; in the 1880s, three lists were collected from non-Karankawa who knew some words.
Document 15: Maric languages: Maran or Maric is a branch of the Pama–Nyungan family of Australian languages. The well attested Maric languages are clearly related; however, many languages of the area became extinct before much could be documented of them, and their classification is uncertain. The clear Maric languages are:
ground_truth: the Texas coast