Topic: Substitution, Expression, & Definition,

Best Answer Explained in Below-:

The term "polyglot" specifically refers to an individual who is proficient in several languages. The word originates from the Greek "polyglōttos," meaning "many-tongued." A polyglot not only knows multiple languages but also often demonstrates a deep understanding of their grammar, vocabulary, and nuances, allowing for effective communication across different cultures.

In contrast, the other options do not accurately describe someone who speaks multiple languages. A "spokesman" is a person who speaks on behalf of a group or organization, without any implication about their language skills. A "linguist" refers to a person who studies linguistics, which may include understanding many languages, but does not necessarily imply proficiency in speaking them. A "geologist," on the other hand, is a scientist who studies the Earth, its materials, and its processes, which has no relevance to language proficiency.

Therefore, among the provided options, "polyglot" is the term that accurately encapsulates someone who is skilled in several foreign languages, making it the correct choice in this context.