Some interesting news for you:
As you can read in this thread, the correction in the registry under...
Code:
[HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\16.0\Word\Option
and the entry “NoFontMRUList” worked perfectly. At least temporarily.
The problem now is that when a new font type is selected, the “Recently Used Fonts” entry is no longer added. Even deactivating or deleting the “NoFontMRUList” entry does not work. I have no idea why. So I started the System Recovery and it works again.
My advice: It's best to "Stay Away From This One!"
Sometimes we have to collect some experiences and I think Microsoft did this for a reason. Just for your information