It should be possible to Keymap (Change original Keys) for the Numeric Keypad. In Portuguese and other languages worldwide, the the separator for decimals are commas (","); not point (".").
The numeric keypad is almost useless without this function, when using spreadsheets - It's necessary to keep returning to Standard keypad for the COMMA signal - that's really annoying.
Theres some scripts on github just to solve that, by it should be default on the keyboard.