1 Exit MSFS.
2 Go to
C:\Users\YourUserName\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalState\MISSIONS\Custom
3 Delete folder named CustomFlight
4 Install English (United States) language pack
5 Checkbox Beta: Use UTF-8 for worldwide language support
Go to
Control Panel > Region > Administrative tab
Change system locale > checkbox “beta: use unicode UTF-8”
Click OK > restart now
6 Launch MSFS