Name and first name of users: first letters in capital letters

Hello,

To avoid the use of whimsical names (eg EmmAnUelle PalLA), you have sent us a code that allows you to put only the first letters in capital letters (image 1).
It can be found in: JoomlaFolder/media/com_easysocial/apps/fields/user/joomla_fullname/joomla_fullname.php

That's great.

However, some first names (eg Jean-Paul, Pierre-Francois) require two capital letters, one for each word (image 2).

Is there a way to code that ?

Best regards.