interpreter

(noun) someone who mediates between speakers of different languages. Synonyms: translator.

(noun) someone who uses art to represent something. Examples: "His paintings reveal a sensitive interpreter of nature." "She was famous as an interpreter of shakespearean roles."

(noun) an advocate who represents someone else's policy or purpose. Synonyms: spokesperson, representative, voice. Example: "The meeting was attended by spokespersons for all the major organs of government."

(noun) (computer science) a program that translates and executes source language statements one line at a time. Synonyms: interpretive program.