translator: 1. A person who translates written messages from one language to another 2. Someone who mediates between speakers of different languages 3. A program that translates one programming language into another interpreter: 1. Someone who mediates between speakers of different languages 2. Someone who uses art to represent something "his paintings reveal a sensitive interpreter of nature"; "she was famous as an interpreter of Shakespearean roles" 3. An advocate who represents someone else's policy or purpose 4. (computer science) a program that translates and executes source language statements one line at a time

Normally in my country, translators normally do written works. And interpreter mediates between speakers of different languages.