Choose the correct one-word substitute for: ' A person who speaks two languages fluently’ .

The correct option is Bilingual.

Step-by-Step Explanation:

Let's analyze the given sentence and understand the meanings of the provided options to find the correct one-word substitute:

Given Phrase: "A person who speaks two languages fluently"

Options Analysis:

1. Accusation: A charge or claim that someone has done something illegal or wrong.

2. Denunciation: Public condemnation of someone or something.

3. Bilingual: A person who is able to speak two languages fluently. The prefix 'bi-' means "two", and 'lingual' relates to speech or language.

4. Indictment: A formal charge or accusation of a serious crime.

Therefore, the word that best substitutes the given phrase is Bilingual.