Foundations: What counts as human language?

According to 1-What-is-language-24, human language is distinguished from other communication systems by a set of core design features. These features help explain what makes human language different from systems used by bees, monkeys, or even highly trained apes.

Human language is more than communication

Many animals communicate, but 1-What-is-language-24 explains that human language has “numerous features that distinguish it from other communication systems.” In other words, not every communication system counts as language in the full human sense.

Four core properties of human language

The chapter identifies several key properties that are especially important for recognizing human language.

• Discreteness: Messages are made from smaller repeatable parts rather than indivisible wholes. For example, a word can be broken into units of sound. This means language is built from reusable pieces.
• Displacement: Speakers can talk about things that are not present. Human language can refer to the past, the future, or things far away in space.
• Productivity: Language users can create and understand utterances they have never heard before. Human language is not limited to a fixed list of memorized messages.
• Duality of patterning: A small number of discrete parts can be recombined systematically to create a very large number of meaningful utterances. As 1-What-is-language-24 notes, affixes can attach to many roots, and words can combine into novel sentences.

Why these properties matter

Together, these properties show that human language is a structured, generative system. Because language is discrete, speakers can reuse small units. Because it has duality of patterning, those units can be arranged into larger meaningful combinations. Because it is productive, speakers are not restricted to repeating what they have heard before. Because it allows displacement, language can reach beyond the immediate here and now.

Human language and animal communication

1-What-is-language-24 contrasts human language with animal communication and discusses studies of chimpanzees such as Washoe and Nim. Washoe reportedly learned around 200 signs, and Nim learned 125 signs. However, the chapter presents these studies as part of a broader question about whether animals can truly acquire language in the human sense. The key issue is not simply whether an animal can learn signals, but whether it shows the defining properties of human language, especially open-ended productivity and systematic structure.

Sign languages also count fully as human language

The chapter makes clear that sign languages have the same essential status as spoken languages. 1-What-is-language-24 states that sign languages exhibit all of the design features of spoken languages. They have complex syntax, morphology, semantics, and an equivalent of phonology. This is important because it shows that human language is not defined by speech alone; it is defined by its underlying structure and design features.

Key takeaway

What counts as human language is not just the ability to send messages. Human language is characterized by discreteness, displacement, productivity, and duality of patterning. As presented in 1-What-is-language-24, these properties set human language apart from other communication systems and help explain why language is such a powerful and flexible human capacity.

Quick review

• Discreteness: language uses smaller reusable parts.
• Displacement: language can refer to absent things, past events, and future possibilities.
• Productivity: speakers can produce and understand new utterances.
• Duality of patterning: a few basic units can combine into many meaningful expressions.