Good question. And it also raises a further point in my mind ...

Is there a need to standardise numerical representation across every locale ?

I ask this because, in some locales, the number expressed as

700,000

could represent

700 [decimal point] 000

that is, 700 expressed to three decimal places.

In other locales, it would be

700 [thousands separator] 000

I have noticed a mixture of decimal point indicators on invoices these days, and it certainly isn't unusual to get one using the comma [,] as a decimal point rather than the more logical full-stop [.].

Kenneth Spencer