Step 1: Break down the word Polyglot.
"Poly-" is a Greek prefix meaning "many" (polygon = many sides, polytheism = many gods); "Glot/Glotta" is Greek for "tongue" or "language"; combined: Polyglot = a person of many tongues = one who speaks many languages.
Step 2: Eliminate the other options.
A Linguist studies the structure and science of language in general; an Orator is a skilled public speaker; a Translator converts text between two specific languages; none of these mean "speaks many languages."
Step 3: Confirm the answer.
A person who speaks many languages is specifically called a Polyglot.
\[ \boxed{\text{Polyglot}} \]