In that case, you’re probably using Windows’ Language Bar.
In Windows 10, it appears in the system tray (lower-right corner of the taskbar by the time and date) as a 3-letter abbreviation, such as: ENG
There is a common problem that’s been around for awhile, and it’s back with a vengeance in Windows 10: Windows automatically applies some updates, and after your puter reboots, POOF!
No more Language Bar!
How do you get your Language Bar back? Read on!