import type { LanguageCode } from '@longrun-ai/kernel/types/language';
export type WorkLanguageSource = 'os' | 'default';
export declare function getWorkLanguage(): LanguageCode;
export declare function setWorkLanguage(language: LanguageCode): void;
export declare function detectOsDefaultWorkLanguage(env: NodeJS.ProcessEnv): LanguageCode | null;
export declare function resolveWorkLanguage(options: {
    env: NodeJS.ProcessEnv;
}): {
    language: LanguageCode;
    source: WorkLanguageSource;
};
