Which professional is certified to evaluate and treat language disorders?

The correct choice is a speech therapist. Speech therapists, also known as speech-language pathologists, are specifically trained and certified to assess, diagnose, and treat communication and swallowing disorders, which include language disorders. Their training encompasses understanding the complexities of language development, articulation, fluency, and the cognitive aspects of communication, allowing them to effectively create individualized treatment plans for clients with language difficulties.

In contrast, while language specialists may have expertise in certain aspects of language, they are not typically recognized as a formal professional title within healthcare or educational systems that involve certification specifically for the evaluation and treatment of language disorders. Occupational therapists focus primarily on helping individuals develop or regain daily living skills and may address communication as a secondary concern, but they do not specialize in language disorders to the depth required for certification. Psychologists may deal with language in the context of cognitive and emotional assessments but are not specialized in evaluating and treating language disorders as their primary area of expertise.