interface NysiisOptions {
    maxLength?: number;
    strict?: boolean;
    languageRules?: string[];
}
declare class Nysiis {
    private readonly vowels;
    private readonly options;
    private readonly firstCharRules;
    private readonly lastCharRules;
    private readonly middleCharRules;
    private readonly accentMap;
    private static readonly DEFAULT_OPTIONS;
    constructor(options?: NysiisOptions);
    /**
     * Encodes a name using the NYSIIS algorithm
     */
    encode(name: string): string;
    /**
     * Validates the input string
     */
    private isValidInput;
    /**
     * Preprocesses the input name
     */
    private preprocessName;
    /**
     * Translates first characters according to language-specific rules
     */
    private translateFirstCharacters;
    /**
     * Translates last characters according to NYSIIS rules
     */
    private translateLastCharacters;
    /**
     * Applies middle character rules
     */
    private applyMiddleCharRules;
    /**
     * Handles vowel transformations with harmony
     */
    private handleVowel;
    /**
     * Generates the NYSIIS key
     */
    private generateKey;
    /**
     * Finalises the NYSIIS key
     */
    private finaliseKey;
    /**
     * Gets available language rules
     */
    getAvailableLanguages(): string[];
    /**
     * Sets active language rules
     */
    setLanguageRules(languages: string[]): void;
}
export default Nysiis;