General:
* Linguist: This is the most common and general term for someone who studies language.
* Language Expert: This is a broad term that can encompass various fields related to language.
* Language Professional: This term is often used for those working in practical language-related fields.
Specific Roles:
* Translator: Translates written or spoken language from one language to another.
* Interpreter: Interprets spoken language in real-time.
* Language Teacher: Teaches languages to others.
* Speech-Language Pathologist: Specializes in communication disorders and speech therapy.
* Lexicographer: Compiles and writes dictionaries.
* Linguistic Anthropologist: Studies the relationship between language and culture.
* Computational Linguist: Develops computer-based systems for language processing.
* Forensic Linguist: Applies linguistic principles to legal proceedings.
Other:
* Language Consultant: Provides language-related advice and services.
* Language Specialist: This is a broad term that can be used in various contexts.
The best term to use will depend on the specific context and the individual's expertise.