(How) Can I enable a different decimal seperator for variables?

Hi there. I'm not sure if this has been asked before but I haven't found any similar question.

Here in Germany we use a comma as a decimal seperator (for example when we write "35,50 €"). My problem is that in Cap2017, which we currently use at our org, I can't do basic arithmetic operations with variables that use a comma as a decimal seperator. It only works with a dot. This is problematic because I want to use a TEB variable with user input.

Is there any way to change a setting to switch over from dots to commas as seperators or enable both? The only other option would be to basically convert the user input variables via JS.