Here are the key characteristics of human language:
- Productivity/creativity - Language allows for infinite expression of new ideas through novel combinations of words.
- Cultural transmission - Language is learned socially through interaction rather than genetically. It evolves over generations.
- Displacement - Language can be used to communicate about things absent in space and time, including past/future events and imaginary concepts.
- Arbitrariness - The relationship between words and what they refer to is arbitrary and learned through convention rather than natural law.
- Duality of patterning - Language has two levels of structure - sounds combine into words, and words combine into sentences.
- Specialization - Language relies on specialized vocal