- Marginal languages (e.g., pidgin, trade languages)
- Languages confined to a particular sex, occupation, social class, or ethnic
- Special adaptations of speech (e.g., yodeling, whistling, ventriloquism), etc.
- Sign languages 201
- Writing 212
- Drum languages 202
Outline of Cultural Materials. George P. Murdock, et al., eds. New Haven, Conn. Human Relations Area Files, Inc. 1961. xxv, 164 p.