import { LocaleConverter } from '../types';
/**
 * Spanish Number to Words Converter
 *
 * Features:
 * - Spanish number system with proper gender agreement
 * - Currency: Euro and céntimos
 * - Handles masculine/feminine forms (uno/una, dos/dos)
 * - Special cases for 100 (cien vs ciento)
 * - Proper compound number formation
 * - Regional variations handled (standard Spanish)
 */
export declare class SpanishConverter implements LocaleConverter {
    private readonly ones;
    private readonly onesFeminine;
    private readonly tens;
    private readonly twenties;
    private readonly hundreds;
    private readonly scales;
    convert(amount: number): string;
    private isValidNumber;
    private parseAmount;
    private convertWholeNumber;
    private convertTens;
    private convertHundreds;
    private convertScale;
}