/**
* Locale-aware renderer wrapper. Picks one of the registered
* sub-renderers based on `msg.locale` and falls through to the
* default. Combine with Handlebars / Liquid / React for a simple
* i18n-first pipeline.
*
* ```ts
* email.use(withRender(i18nRenderer({
*   fallback: handlebarsRenderer(),
*   byLocale: { tr: handlebarsRenderer({ ... }), en: handlebarsRenderer({ ... }) },
* })))
* ```
*
* @module
*/
import type { EmailMessage } from "../types.mjs";
import type { Renderer } from "./_middleware.mjs";
export interface I18nRendererOptions {
	byLocale: Record<string, Renderer>;
	fallback: Renderer;
	/** Override how the locale is resolved. Defaults to
	*  `msg.locale || msg.template?.locale || msg.headers?.["accept-language"]`. */
	resolveLocale?: (msg: EmailMessage) => string | undefined;
}
export declare function i18nRenderer(options: I18nRendererOptions): Renderer;