import { App, Ref } from 'vue';
export type Locale = string;
export interface I18n {
    /**
     * Locale message translation
     *
     * @param key - The translation key
     * @param params - A values of named interpolation
     *
     * @returns translation message
     * @example `t('Hello {user}!', { user: 'John Doe' })` - returns: 'Hello John Doe!'
     */
    t: (key: string, params?: Record<string, any>) => string;
    /**
     * Change the locale dynamically
     *
     * @param newLocale - The locale to switch to
     */
    setLocale: (newLocale: Locale) => Promise<void>;
    /**
     * Get the current locale
     *
     * @returns Current locale
     */
    locale: Ref<Locale>;
}
export interface TranslateTextResponseList {
    translations: TranslateTextResponseTranslation[];
}
export interface TranslateTextResponseTranslation {
    translatedText: string;
}
export interface GoogleTranslationResponse {
    data: TranslateTextResponseList;
}
/**
 * Query parameters for making a request to the Google Cloud Translate API v2.
 * Reference: https://cloud.google.com/translate/docs/reference/rest/v2/translate
 */
export interface GoogleTranslateRequestQueryParams {
    /**
     * The input text to translate.
     * Can be a single string or an array of strings (up to 128 items).
     * Example: "Hello world" or ["Hello", "How are you?"]
     */
    q: string | string[];
    /**
     * The target language code to translate the input text into.
     * Must be a supported language code from:
     * https://cloud.google.com/translate/docs/languages
     * Example: "id" for Indonesian, "es" for Spanish.
     */
    target: string;
    /**
     * (Optional) The format of the source text.
     * Use `"text"` for plain text or `"html"` if the source contains HTML tags.
     * Default is `"html"`.
     */
    format?: 'html' | 'text';
    /**
     * (Optional) The source language code of the input text.
     * If omitted, the API will automatically detect the source language.
     * Supported language codes: https://cloud.google.com/translate/docs/languages
     * Example: "en" for English.
     */
    source?: string;
    /**
     * A valid API key for authenticating the request.
     * You can generate and manage API keys in the Google Cloud Console:
     * https://console.cloud.google.com/apis/credentials
     */
    key: string;
}
export declare const useI18n: () => I18n;
declare const _default: {
    install: (app: App) => void;
};
export default _default;
declare module 'vue' {
    interface ComponentCustomProperties {
        $i18n: I18n;
        $t: I18n['t'];
    }
}