Usually credited to Noam Chomsky, the theory of universal grammar suggests that all possible human languages share certain properties, such as the rules of grammar. For Chomsky, the development of language involves genetic endowment, external data, and principles not specific to the faculty of language (i.e. those properties of the brain that cause it to learn language).

Also called convolution of Broca, the Broca area region of the brain contains motor neurons involved in speech production. The Broca region was discovered by a French surgeon, named Paul Broca, in 1861. 

Broca's area is a region of the frontal lobe of the cortex, and is linked to the ability to produce speech. Damage to Broca's area can lead to Broca's aphasia, which is the inability to speak out loud.

In contrast, Wernicke's area is located in the temporal lobe of the cortex and is credited with processing and interpreting the speech of others. Damage to Wernicke's area could leave a patient unable to comprehend a spoken request. Remembering a phone number would require processing by the hippocampus, which is a component of the limbic system credited with memory storage. Blue-yellow color blindness arises when a genetic disorder leaves the individual unable to produce cones that detect light at short wavelengths (such as blue).

The Sapir-Whorf hypothesis (also known as linguistic relativity) states that language shapes the way we see the world. The strong version of the theory states that language determines thought, whereas the weak version states that language merely influences some non-linguistic processes.

Noam Chomsky proposed that we all are born with a "language acquisition device" in our minds, which gives us universal principles of human language. We learn our language's own "settings" for human communication according to these universal principles. For instance, if all human language has temporal tenses, we learn how our particular language expresses tense. Although the behaviorists believe we only learn language through our environment, Chomsky pointed out that we learn language very quickly through processes that appear similar to the human species, regardless of environment.

Semantics and syntax are fields of linguistics that concern different aspects of language. Syntax is primarily concerned with the universal properties and idiosyncrasies of the structure of language. For example, syntax studies how we construct our language an speech, and how we form certain phrases and clauses. Semantics is concerned with deciphering meaning in language by looking at its logical structure, the meaning of words, or how it is represented cognitively.   

Displacement is a unique property of human language. The only possible exception is in the case of bees, which may have a method of communicating directions to a plant they found. Other than this, we are unique in our ability to discuss events or objects that are not immediately apparent such as places far away, the past, and the future. Some have even theorized this was where the need for language began.

Syntax is primarily concerned with the ordering of words and phrases, and their respective grammatical functions. That said, it assists in conveying meaning but is not the singular mode to express meaning. For instance, independent of whether or not the word "cat" is ordered in a particular way in a sentence, we know the word refers to a small fluffy feline animal. This is semantics.

However, if we place "cat" at the beginning of the sentence—"the cat sniffed the pigeon"—we know the cat is performing the action of sniffing. But once we reverse the order so that the sentence is "the pigeon sniffed the cat," we know the cat is being sniffed by the pigeon. The order of the nouns, verbs, and objects is determined by the syntactic rules of a language thus assists in conveying meaning.

The "C" sound—represented phoenetically as [k], a voiced velar stop—is a phoneme of the English language. Phonemes are units of sound that can distinguish meaning in a language. Another example would be "G" and "B." Since "boat" and "goat" would sound exactly the same if it weren't for the first consonant, we know the first consonant is used to distinguish between the meaning of these two words. Therefore, we know that both "B" and "G" are phonemes of English.

At this particular stage of language acquisition, babies are transitioning away from babbling and beginning to develop communication using whole words. They can only say simple words and cannot combine them, even into simple commands, which is the next stage of acquisition.