There was a known bug in a previous version of the app in which multiple training reminders and Word of the Day notifications were appearing on the device. It was fixed in version 3.1.5, but it's possible that you're still experiencing it today. Here is the workaround to clear them up:
- Slide the home screen to the right.
- Tap Settings.
- Scroll down to Word of the Day and switch the toggle ON and OFF a few times.