Formal:
* Language Instructor: This is a general term for anyone who teaches a language.
* Foreign Language Teacher: This specifically refers to someone who teaches a language that is not the native language of the students.
* Language Professor: This is used for teachers at the university level.
Informal:
* Language tutor: This is used for someone who provides private language instruction.
* Language coach: This emphasizes the teacher's role in helping students improve their communication skills.
* Language teacher: This is a general and widely understood term.
Specific:
* Spanish teacher: This refers to a teacher of the Spanish language.
* English as a Second Language (ESL) teacher: This refers to a teacher who teaches English to non-native speakers.
The best way to refer to a language teacher depends on the specific situation. For example, if you are writing a formal letter, you might use the term "Language Instructor." If you are talking to a friend, you might say "Language teacher" or "Spanish teacher."
In addition to these terms, you can also use the teacher's name and title, such as "Professor Smith" or "Ms. Jones, the English teacher."