The history of this is that at some point, Arab mathematicians settled on a small pen stroke to separate decimals. When this got typeset, people found it convenient to just reuse the point or comma. Different countries made different choices, and now we have to deal with that.

The original arabic character now has a Unicode code point, so we could fix the mess by switching back to that ;-) https://www.fileformat.info/info/unicode/char/066b/index.htm