export declare const LANGUAGE_VALUE_ERROR = "Language values cannot be blank or contain path separators, drive prefixes, dot segments, or control characters.";
export declare function isSafeLanguageValue(value: string): boolean;
export declare function normalizeLanguageValue(value: string): string;
export declare function normalizeLanguageValues(values: readonly string[]): readonly string[];
export declare function getLanguageDisplayName(value: string): string;