How to change syntax of decimal/thousand separator

I live in Europe, and we are using "," comma as decimal, and "." dot as thousand separator signs. How can I change the settings, maybe also generally, as I always use this here?

If you're using the form calculation widget you could change the decimal separator between point and comma. 

You only need to open the wizard and click on the more button: 

Once there, go to the options tab and there you will find the option to use either point or comma. 

You may also give a try to the masked input widget that will help you to further customize this: https://widgets.jotform.com/widget/masked_input 

Hope this helps.