General Expertise:
* Linguist: This is a broad term for someone who studies language, including its structure, history, and use.
* English Language Specialist: This term is often used for educators or professionals with a strong understanding of English grammar, vocabulary, and usage.
* Language Expert: This term can be used in various contexts, encompassing expertise in different aspects of language.
Specific Expertise:
* Lexicographer: An expert in lexicography, which is the study and compilation of dictionaries.
* Etymologist: An expert in etymology, which is the study of word origins and history.
* Grammarian: An expert in grammar, particularly in the rules and principles of a language.
* Stylist: An expert in the art of writing, focusing on style and clarity.
* Linguistic Anthropologist: An expert in the relationship between language and culture.
* Computational Linguist: An expert in the use of computers and algorithms to study and process language.
Other Options:
* Language Teacher: An expert in teaching English as a foreign or second language.
* Copyeditor: An expert in editing and proofreading written text.
* Technical Writer: An expert in writing clear and concise technical documentation.
The best term to use depends on the specific context and the area of expertise you want to highlight.