Not able to understand this error

[sunnykarira]

language: subtag “securid” is well-formed but unknown

var browserLocaleLanguageMatcher = language.NewMatcher([]language.Tag{
	language.English,
	// The first language in the list is used by default.
	language.French,
	language.Portuguese,
	language.Italian,
	language.Spanish,
	language.German,
})

//GetLanguage ...
func (m *BrowserLanguageGetter) GetLanguage(req *http.Request) (lang string, err error) {
	acceptLanguage := req.Header.Get("Accept-Language")
	t, _, err := language.ParseAcceptLanguage(acceptLanguage)
	if err != nil {
		return "", errors.Wrap(err, "parse accept language")
	}
	// Matches the best language , if not found then returns the first tag in matcher.
	tag, _, _ := browserLocaleLanguageMatcher.Match(t...)
	return tag.String(), nil
}

Accept-language in header = en-securid

Parser is not able to parse?

[calmh (Jakob Borg)]

I think the error is quite clear. “Securid” is not a known locale where English is spoken.

[lutzhorn]

What country is securid supposed to be?

[vitr (Vitaliy Ryepnoy)]

it’s a “smart invention” by RSA

When you install the web browser plug-in for Internet Explorer with the SecurID desktop application, the en-securid language setting, which allows the browser to recognize web pages protected by RSA SecurID, is added only for the local user who installs the application.

from internet explorer - What does "Accept-Language: en-securid" header ...mean? - Stack Overflow
@sunnykarira you should filter out this “language” before parsing or ignore the parsing error for this one

[sunnykarira]

Thanks. I will serve english as default language incase we get broken or not acceptable “Accept-language” in header.