import { NodePart } from "lit-html";
import { LangChangedEvent, Values, ValuesCallback } from "./model";
/**
 * A lit directive that invokes the callback when the language changes.
 * @param key
 * @param values
 * @param listen
 */
export declare const langChanged: (cb: (e?: LangChangedEvent | undefined) => any) => (part: NodePart) => void;
/**
 * A lit directive that updates the translation when the language changes.
 * @param key
 * @param values
 */
export declare const translate: (key: string, values?: Values | ValuesCallback | undefined) => (part: NodePart) => void;