import { type ComputedRef } from 'vue';
import type { I18nMessageKeys } from './message';
export declare const validLanguages: readonly ["zh-CN", "en-US"];
export type Language = (typeof validLanguages)[number];
export declare function useI18nAgg(): Readonly<{
    states: Readonly<{
        currentLanguage: Readonly<import("vue").Ref<"zh-CN" | "en-US", "zh-CN" | "en-US">>;
    }>;
    commands: Readonly<{
        setLanguage: (lang: Language) => void;
        t: {
            (key: I18nMessageKeys, defaultValue?: string): string;
            (key: I18nMessageKeys, attr: Record<string, string | number>, defaultValue?: string): string;
        };
        $t: {
            (key: I18nMessageKeys, defaultValue?: string): ComputedRef<string>;
            (key: I18nMessageKeys, attr: Record<string, string | number>, defaultValue?: string): ComputedRef<string>;
        };
    }>;
    events: Readonly<{}>;
}>;