/**
 * @license
 * Copyright 2026 Qwen
 * SPDX-License-Identifier: Apache-2.0
 */
import type { LiveLanguage } from '../i18n/messages.js';
/**
 * Notification language comes only from real user transcripts, never search
 * queries generated by the model, quoted web evidence, or backend reports.
 * Keep this outside a transport so reconnection cannot reset it to the UI.
 */
export declare class ConversationLanguage {
    private current?;
    private preference?;
    observeUserTranscript(transcript: string): void;
    resolve(fallback: LiveLanguage): LiveLanguage;
}