"Locales" such as Dutch, Danish, Catalan etc., are not used by the New UI. It ignores these settings and continues to display content as per standard "English".
Steps to Reproduce:
1. Go to Account Settings
2. Change "Locale" to any locale which supports comma as a separator. For example: "Danish"
3. Logout
4. Log back in
5. Navigate to the New UI
6. Click on "Timesheets"
7. Create a timesheet
8. Enter hours as "8,5"
Expected Result: The hours remain as "8,5"
Actual Result: The hours change to "85.00"
Caused by a defect - DE33379.
The bug is targeted to be fixed in the upcoming version of PPM which is scheduled around late 2017.