type LocaleData = {
    [key: string]: any;
};
type I18nOptions = {
    locales?: string[];
    defaultLocale?: string;
    directory?: string;
    extension?: string;
    cookieName?: string;
    sessionVarName?: string;
    indent?: string;
    register?: Record<string, any>;
    request?: any;
    query?: boolean;
    session?: boolean;
    subdomain?: boolean;
};
export declare class I18n {
    private devMode;
    private static locales;
    private defaultLocale;
    private directory;
    private extension;
    private cookieName;
    private sessionVarName;
    private indent;
    private request?;
    private prefLocale?;
    static localeCache: Record<string, LocaleData>;
    static resMethods: Array<keyof I18n>;
    constructor(options?: I18nOptions);
    __: (key: string, ...args: any[]) => string;
    __n: (singular: string, plural: string, count: number, ...args: any[]) => string;
    setLocale(locale: string): string;
    registerMethods(helpers: Record<string, any>, req: ReqType): Record<string, any>;
    getLocale(): string;
    isPreferredLocale(): boolean;
    translate(locale: string, singular: string, plural?: string): any;
    private readFile;
    private writeFile;
    private locateFile;
    static appendLocale(locale: string, data: any): void;
    static getLocales(): Record<string, LocaleData>;
}
export {};