Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. language-related concepts
5. [languages and writing systems]
6. [languages and writing systems by general type]
7. languages (established systems of communication)

Anotations

Scope note:

Languages that were consciously devised for communication, with invented phonology, grammar, and vocabulary, as contrasted to languages that developed naturally. Constructed languages are typically characterized by being artificial, but possessing a literature and designed for the purpose of human communication. Specifically excluded are reconstructed languages and computer programming languages.