* Linguist: This is a broad term for someone who studies language, which includes spelling.
* Orthography specialist: This term specifically refers to someone who focuses on the study of spelling systems.
* Educator: Teachers and educators are involved in teaching spelling, especially at younger ages.
* Lexicographer: This term refers to someone who compiles dictionaries, which involve analyzing and defining words, including their spelling.
You could also use more general terms like spelling enthusiast, spelling researcher, or spelling expert depending on the specific focus.