import { type Locale, type MessageTree } from "../../ui/src/i18n/index.js";
import type { Ref } from "vue";
export type ExtensionT = (key: string, values?: Record<string, unknown>, plural?: number) => string;
export declare const extensionT: (extensionId: string) => ExtensionT;
export declare const registerExtensionMessages: (extensionId: string, messages: {
    readonly base: MessageTree;
    readonly load: (locale: string) => Promise<{
        readonly default: MessageTree;
    }>;
}) => Promise<void>;
export declare const activeLocale: Readonly<Ref<Locale>>;
export type { Locale };