})
	if k < len(AliasMap) && AliasMap[k].From == uint16(id) {
		return Language(AliasMap[k].To), AliasTypes[k]
	}
	return id, AliasTypeUnknown
}

// getLangISO2 returns the langID for the given 2-letter ISO language code
// or unknownLang if this does not exist.
func getLangISO2(s []byte) (Language, error) {
	if !tag.FixCase("zz", s) {
		return 0, ErrSyntax
	}
	if i := lang.Index(s); i != -1 && lang.Elem(i)[3] != 0 {