@misc{rfc5645,
    series =    {Request for Comments},
    number =    5645,
    howpublished =  {RFC 5645},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5645},
    url =       {https://www.rfc-editor.org/info/rfc5645},
    author =    {Doug Ewell},
    title =     {{Update to the Language Subtag Registry}},
    pagetotal = 13,
    year =      2009,
    month =     sep,
    abstract =  {This memo defines the procedure used to update the IANA Language Subtag Registry, in conjunction with the publication of RFC 5646, for use in forming tags for identifying languages. This memo provides information for the Internet community.},
}