How to add 2 letter language code in ISO 639-1

[Saroj]

Thanks sir for your valuable comment.

On Feb 28, 2017 9:07 PM, "Doug Ewell" <doug at ewellic.org> wrote:

> Saroj <sarojchakma20 at gmail dot com> wrote:
>
> > Hi, I want to know how to add Chakma Language in two letter code. We
> > have 3 letter code in ISO 639-3 as ccp.
>
> According to the ISO 639 Joint Advisory Committee [1]:
>
> "A language code already in ISO 639-2 at the point of freezing ISO 639-1
> shall not later be added to ISO 639-1. This is to ensure consistency in
> usage over time, since users are directed in Internet applications to
> employ the alpha-3 code when an alpha-2 code for that language is not
> available."
>
> Even if such a code element were added to ISO 639-1, it would not be
> added to the IANA Language Subtag Registry. According to RFC 5646 [2]:
>
> "In order to avoid instability in the canonical form of tags, if a
> two-character code is added to ISO 639-1 for a language for which a
> three-character code was already included in either ISO 639-2 or ISO
> 639-3, the two-character code MUST NOT be registered."
>
> and:
>
> "Codes assigned by ISO 639-1 that do not conflict with existing
> two-letter primary language subtags *and that have no corresponding
> three-letter primary defined in the registry* are entered into the IANA
> registry as new records of type 'language'." [emphasis added]
>
> [1] http://www.loc.gov/standards/iso639-2/iso639jac_n3r.html
> [2] https://tools.ietf.org/html/rfc5646
>
> --
> Doug Ewell | Thornton, CO, US | ewellic.org
>
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