Here's some more of the LCID structure.
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/63d3d639-7fd2-4afb-abbe-0d5b5551eef8
I'd also look at the References and other sections shown on the table of contents on the left hand panel.



On Wed, Mar 10, 2021 at 7:53 PM Thad Guidry <thadguidry@gmail.com> wrote:
Hi Denny,

I think that using an open spec like Microsoft's LCID would probably come in useful here?  There are mappings to ISO codes, etc.

https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/70feba9f-294e-491e-b6eb-56532684c37f

I'm not an expert in this particular area, but I do know that in present day, from some scientists, that this is how some of their systems interact with Digit's rather than Letters when there is a need.
There is some history with LCID's here also with W3C, IANA and other orgs, but I was never a part of the standards or open spec drafts at the time in the 90's, so I don't know the history.
https://www.w3.org/International/ms-lang.html

So you might have to poke some other folks more in the know than myself.