On 31 Jan 2019, at 15:00, Clyde Johnston
wrote: Maybe this should be a language specific parameter. How would you achieve a similar result with the Indian numbering system, for instance?
It is an additional feature that may or may not be linked to language. For example, in Swedish originally, the comma and stop are reversed relative English, but in modern times, a stop for decimal point might be used. To avoid confusion between commas and stops as decimal points there is an recommendation admitting both, using spaces as separators. And in India, they might prefer digit groups of two instead of three.
Also, decimal and thousands separators vary from country to country. In France, for example, they use the comma for the decimal separator, and space for the thousand separator.