export declare function bcp47Match(code: string): boolean;
export declare function bcp47Parse(code: string): {
    language: string | null;
    script: string | null;
    region: string | null;
    variant: string | null;
    extension: string | null;
    privateUse: string[];
    irregular: string | null;
    extlang: string | null;
};
export declare function bcp47Index(code: string): number[] | null;
export declare function bcp47Find(code: string): import("./model").LangTag | import("./model").LangTag[] | null | undefined;