Issue #365615 followup by attiks, YesCT, Gábor Hojtsy, mgifford, Albert...

Issue #365615 followup by attiks, YesCT, Gábor Hojtsy, mgifford, Albert Volkman, plach, webwarrior, David_Rothstein, penyaskito, smokris | yang_yi_cn: Fixed Followups: Language detection not working correctly for most Chinese readers (and add a user interface for all browser language mappings).