Isolated languages

These are languages that were created from a larger family with one or more parent historic language, but whose all members except one are now extinct, and difficult to resurrect due to insufficient traces, and high level of improbabilities to classify them with convincing evidence demonstrated by expert linguists. In some cases, some living languages way be generally considered isolated even if there's some evidence that they could be split from a major one (frequently considered to include a minor variant even if it has very significant differences). In any case, the languages listed in this isolated category are difficult to classify in other main families.

Cofán (or Cofan, Kofán, Kofan, Kofane, Colin, A’i, A’ingae, A’ingaé) [con] (disabled)
Canichana (or Kanichana, Canesi, Canisiana, Joaquiniano) (†) [caz] (disabled)
Elamite (†) [elx] (disabled)
Sumerian (†) [sux] (disabled)
Tremembé (or Teremembé) (†) [tme] (disabled, unattested)
Tunica [tun] (disabled)
Zuni (or Zuñi, Shiwi’ma) [zun] (disabled)
Paez (or Páez, Paes, Nasa Yuwe) [pbb]
- Paniquita
- Pitayo
Burushaski [bsk] (disabled)
- Wershikwar (or Yasin Burushaski)
- Burushaski proper (or Hunza-Nagar Burushaski)
  - Hunza Burushaski
  - Nagar Burushaski
Ainu languages (?) (see subpage)
Vasconian languages
- Aquitanian (†) [xaq] (disabled)
- Basque [eu]
  - Alavan
  - Alto Navarro Meridional
  - Alto Navarro Septentrional
  - Souletin Basque
  - Biscayan
  - Guipuzcoan
  - Roncalese
  - Navarro-Labourdin Basque
    - Labourdin
    - Eastern Low Navarrese
    - Western Low Navarrese