Price fields in US dollars have decimal fields separated by a dot and other currencies with a comma, so far so good. However, when using a numerical field, it has to be separated by a dot.
This might sound silly because for me it is obvious that if one does not work, the other will, but for others it is not obvious.
It would be helpful if users could choose their preferred decimal separator. We've received a few requests where people commented, for instance, 'It was supposed to be 9,5, but I put 10 because it does not allow decimals,' even though it does.
Would be cool if we could choose!