[bramhaag]

The site is confusing, even as a European: both periods and commas are used as decimal separators.

[ninalanyon]

SI allows either but the document should be consistent. Thousands separators are a half width space.

"The decimal marker shall be either the point on the line or the comma on the line. The decimal marker chosen should be that which is customary in the context concerned."

https://www.npl.co.uk/si-units