buf := [3]byte{}
		intToStr(uint(b), buf[:])
		return string(buf[:])
	}
	l := lang.Elem(int(b))
	if l[3] == 0 {
		return l[:3]
	}
	return l[:2]
}

// ISO3 returns the ISO 639-3 language code.
func (b Language) ISO3() string {
	if b == 0 || b >= langNoIndexOffset {
		return b.String()
	}
	l := lang.Elem(int(b))
	if l[3] == 0 {
		return l[:3]
	} else if l[2] == 0 {

	return Base{l}, err
}

// String returns the BCP 47 representation of the base language.
func (b Base) String() string {
	return b.langID.String()
}

// ISO3 returns the ISO 639-3 language code.
func (b Base) ISO3() string {
	return b.langID.ISO3()
}

// IsPrivateUse reports whether this language code is reserved for private use.
func (b Base) IsPrivateUse() bool {
	return b.langID.IsPrivateUse()
}