Re: Org table: numeric locale

[Maxim Nikulin]

On 28/08/2021 14:07, Jarmo Hurri wrote:
> I wonder if it is possible to get org table formulas to respect numeric
> locale.

Even to add some functions to Emacs that respect numeric locales, it is 
necessary to use e.g. dynamic modules (warning: do not try to change 
global locale by setlocale(3), almost certainly something in Emacs will 
be broken, a library that allows local locale objects is strongly 
preferred).
https://www.gnu.org/software/emacs/manual/html_node/elisp/Writing-Dynamic-Modules.html

> Emacs documentation says that Emacs uses the value of LC_NUMERIC:
>
> https://www.gnu.org/software/emacs/manual/html_node/emacs/General-Variables.html

It is a confusing statement, see:
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29645
  #29645 Feature Request: Locale aware formatting
  Date: Sun, 10 Dec 2017 15:05:02 UTC
- https://lists.gnu.org/archive/html/emacs-devel/2021-06/msg00327.html
  https://lists.gnu.org/archive/html/emacs-devel/2021-06/msg00139.html

The state of numeric locales in Emacs is a little worse than just 
unsupported. Mostly "C" is forced for LC_NUMERIC, so e.g. grouping is 
not used. However if your locale uses comma "," as decimal separator,
you may be confused by calc results:

    M-x calc RET dg RET 123456
    123,456