/**
 * Returns the plural of an English word.
 *
 * @param {string} word
 * @param {number} [amount]
 * @returns {string}
 */
export declare function plural(word: string, amount?: number): string;
/**
 * Returns the singular of an English word.
 *
 * @param {string} word
 * @param {number} [amount]
 * @returns {string}
 */
export declare function singular(word: string, amount?: number): string;