What is the person who studies development of language?

The person who studies the development of language is called a linguist. More specifically, they might be called a developmental linguist, child language specialist, or psycholinguist.

These experts focus on:

* How children acquire language: They study the stages of language development, from babbling to complex sentence structure.

* The cognitive processes involved in language: They examine how children's brains process and learn language.

* Factors influencing language development: They consider the role of environment, genetics, and social interaction in shaping language skills.

* Disorders of language development: They research and treat conditions like speech and language impairments.

While "linguist" is a broad term, these more specialized titles highlight the specific focus on language development.