%% You should probably cite rfc3282 instead of this I-D.
@techreport{alvestrand-content-language-03,
    number =    {draft-alvestrand-content-language-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-alvestrand-content-language/03/},
    author =    {Harald T. Alvestrand},
    title =     {{Content Language Headers}},
    pagetotal = 8,
    year =      2002,
    month =     feb,
    day =       18,
    abstract =  {This document defines a "Content-language:" header, for use in cases where one desires to indicate the language of something that has RFC 822-like headers, like MIME body parts or Web documents, and an "Accept-Language:" header for use in cases where one wishes to indicate one's preferences with regard to language. {[}STANDARDS-TRACK{]}},
}