Change the language of your Windows system to anything but English and then open your Excel file with formulas again.
I don't get your point
programming languages aren't allowed to be in non-english somehow?
ok, what happens? (I'm not messing around on my system right now ...)
Classic one++ (-:
When I worked at a university's tech support, this was a recurring problem. People made grade lists in Excel, then imported them into the digital learning environment, which occasionally was set to a different language. This meant that the decimal point would be disregarded, and e.g. an 8.5/10 would be imported as an 85 (which got clamped to 10). Maximum grades for everyone, confused students and teachers :')