Photo Album and Folder naming Reversed text

I think when this has come up before, one of these things has fixed it. Unfortunately, I don't remember which, drat.

• Restart the computer (of course)
• Re-start in Safe Mode. This bypasses certain potentially disruptive processes, and it often helps. Safe Mode is different for different computers, so see this: 

           Start up your Mac in safe mode - Apple Support 

• Rebuild your Photos Library--close Photos and re-launch by option-command-clicking the app icon. If you use iCloud Photos, it’s possible that this will cause a re-sync that lasts long enough to make you nervous.

Let us know if something works-- I'll write it down this time!

OK, try this:

• Use another library if you have one, or make a small test Library with a few pictures in it and see if the same thing happens. You can create a new Library by closing Photos and then option-clicking on the Photos icon.
• Make a new user and see if the same problem recurs with it.  This is a bit harder, because a new user can't access a different user's stuff. You would need to move your Library out of your own user's folder up to the general "Users" folder. Or you could make a new one and add som pictures.

That will tell us if it's the Library of if your User account is at fault.

Just a hunch, but you may have accidentally triggered some Accessibility settings, either for the keyboard or Pointer Control.

Please check all settings that could make the poster jump accidentally - see this page in the user guide: Change Accessibility settings on Mac - Apple Support (IE)

particularly

Keyboard settings for accessibility

Pointer Control settings