Estonian             Tag = Tag(compact.Estonian)
	Persian              Tag = Tag(compact.Persian)
	Finnish              Tag = Tag(compact.Finnish)
	Filipino             Tag = Tag(compact.Filipino)
	French               Tag = Tag(compact.French)
	CanadianFrench       Tag = Tag(compact.CanadianFrench)
	Gujarati             Tag = Tag(compact.Gujarati)
	Hebrew               Tag = Tag(compact.Hebrew)
	Hindi                Tag = Tag(compact.Hindi)

	Persian              Tag = Tag{language: faIndex, locale: faIndex}
	Finnish              Tag = Tag{language: fiIndex, locale: fiIndex}
	Filipino             Tag = Tag{language: filIndex, locale: filIndex}
	French               Tag = Tag{language: frIndex, locale: frIndex}
	CanadianFrench       Tag = Tag{language: frCAIndex, locale: frCAIndex}
	Gujarati             Tag = Tag{language: guIndex, locale: guIndex}

// in Accept-Language (with reasonable frequency).
var acceptFallback = map[string]language.Language{
	"english": _en,
	"deutsch": _de,
	"italian": _it,
	"french":  _fr,
	"*":       _mul, // defined in the spec to match all languages.
}

type tagSort struct {
	tag []Tag
	q   []float32
}

func (s *tagSort) Len() int {
	return len(s.q)
}