- Basque language
- dead languages of unknown affiliation
- Japanese language
- hybrid natural languages
- Papuan languages
- African languages
- Korean language
- Ural languages
- Thai languages
- Indo-European languages
- Austro-Asian languages
- palaeoasiatic languages
- Australian languages
- American Indian languages
- Austronesian languages
- Altaic languages
- Caucasian languages
- Dravidian languages
- Sino-Tibetan languages
- Semite-Hamitic languages
- artificial languages