New-UDDatePicker -Locale fr / Locale doesn't work as expected

PowerShell Universal Universal Dashboard
1 
Product: PowerShell Universal
Version: 4.1.4

Hi,

in the doc there is an example with New-UDDatePicker -Locale fr.
The days in the calendar are always in English for me. When I try ‘fr’ or ‘de’ as I need it, the days always stay in English