SilkSpectre

I thought I was having the same issue, and tried a million things before I realized that I wasn't actually setting the system locale, but rather just changing the region/language. The new Windows 10 layout totally threw me off! Go to Settings>Time & Language>Additional Date, Time, & Regional Settings>Change Location>Administrative tab> and then you can change the locale. Restart and it should work perfectly. Maybe that'll help if you made the same silly mistake I did!