Virtual keyboard and square brackets

hello, We use the Access Portal for user authentication on Active Directory with a virtual keyboard for enter the password with manual input disabled And sometimes the users use a password with "square brackets" Opened : "[ " or Closed:" ]". But in my Virtual Keyboard the "square brackets" are not present. the access portal is configured in french language only. How make....

Is it possible to add and personnalize the character list in the virtual keyboard ?

Thanks for your help. Regards