Let the "." on the numeric keypad work as a decimal separator for all countries.
In Dutch, we user the comma as a decimal separator. (0,5 is how we write a half)
Lots of use use the International English keyboard, and the English versions of Adobe CC. But for some reason Illustrator refuses to recognize the "." on the numeric keypad as a separator. When I type "7,2" Illustrator show this correctly in the input fields, but when hitting enter, it makes "72", just skipping the comma.
Please make a Preference to set the "." or "," on the numpad always to act as a decimal separator.
I have the same problem, change date, time or number formats in Windows 10 seems to not working.
What is weird is that Illustrator CS4 (installed on the same machine) doesn't have this problem.
If you want Illustrator to do this correctly you have to change it in Windows settings (if you use Windows)
Control panel > clock and region > change date, time or number formats > additional settings: and swap the period and the comma there.
You can also change the entire formatting in settings > region but this will also change your time formatting to "1:00 PM" instead of "13:00", for example.
This fixed it for me! Hopefully it helps others as well.
Same problem here when using the Russian keyboard language.
I would also like to point out that Adobe InDesign doesn't have this problem — any decimal separator is recognized as a decimal separator for numeric input fields. That's how it should be.
In Russia we also use comma, but both comma and period are recognized fine.
It might be something about you language settings in OS, I had similar problem long ago.