Thanks for that, I didn’t know it was that common. Would be interesting to know whether there was ever an attempt to find a globally consistent form.

If you look at the image, Antarctica has “data unavailable” - seems we still don’t know what the penguins use! /s

For the thousands separator, the International Bureau of Weights and Measures (based in France) recommends the use of a space, and as a result this is used in France.