export declare class Abbreviator {
    #private;
    constructor(language?: string);
    get lang(): string;
    get size(): "long" | "short" | "tiny";
    /**
     * Set the default language for titles. Constructor set the default language to `en_US`.
     *
     * Below the supported languages :
     * - English : `en` or `english`
     * - French : `fr` or `french`
     */
    setLang(language: string): this;
    /**
     * Set the default size for title.
     * Constructor set the default value to `short`.
     */
    setSize(size: string): this;
    /**
     * Returns a universal API abbreviation for the requested book if it exists.
     * - Supported abbreviations are available in the `canonAbbrv.json` file.
     */
    getTag(abbrv: string): string | null;
    /**
     * Returns a title for the requested book if it exists in one of the three following formats (`short` by default):
     * - `long` — Detailed title (ex: Mt → Gospel according to Matthew)
     * - `short` — Short book title (ex: 2 Thess → 2 Thessalonians)
     * - `tiny` — Abbréviation standard (ex: Genesis → Gn)
     *
     * Checkout the `setSize` method to persistantly set the default size to what you want.
     * If you just want a different size for one time, you can set the parameter size to what you want, it won't change the default value.
     */
    getTitle(book: string, size?: string): string | null;
}