I'm using french locale where the decimal separator is ",".
In basic and scientific mode, I can use any of the , and . keys and I get a , displayed and the calculation works as expected.
However, on paper mode, entering . results in . being displayed and the decimal part being lost.
12,3 + 12,3 = 24,6
12.3 + 12.3 = 24
This prevents us from using the . in the numpad, making paper mode almost unusable when dealing with decimal numbers.