export declare function threeLetterCodeToName(iso: string): "English" | "Norsk" | "Nederlands" | "Deutsch" | "Français" | "Español" | "Suomi" | "Русский" | "Portugese" | "Română" | "Türk" | "Polski" | "Български" | "Magyar" | "Český" | "汉语" | "Hrvatski" | "עברית" | "Afrikaans" | "Ελληνικά" | "Eesti" | "Italiano" | "Slovenščina" | "Dansk" | null;
export declare function threeLetterCodeToTwoLetterCode(iso: string): "en" | "no" | "nl" | "de" | "fr" | "es" | "fi" | "ru" | "pt" | "ro" | "tk" | "pl" | "bg" | "hu" | "cz" | "hh" | "cr" | "he" | "af" | "it" | "sl" | "da" | null;
export declare function twoLetterCodeToThreeLetterCode(twoLetter: string): "deu" | "nld" | "nor" | "eng" | "fra" | "spa" | "fin" | "rus" | "por" | "ron" | "tur" | "pol" | "bul" | "hun" | "ces" | "chi" | "hrv" | "heb" | "afr" | "ita" | "slv" | "dan" | "und";