Hard to believe that you deleted those fonts, because System Integrity Protection (SIP) needs to be disabled to do so. If you don´t know, what I´m talking about, it´s likely that you didn´t delete anything important, but do have some other problem.
Yes, you could install your macOS and be done with it. But you could also try:
- Just restart your Mac
- Have a look at /System/Library/Fonts if the fonts are still there
- Boot into safe mode (hold down Shift during reboot) and boot back normal
- remove fontd system and user databases with that terminal command (open Terminal app, paste the following command, press enter, enter your admin password, nothing will be written, that´s just normal, press enter again, close Terminal and reboot):
Code:
sudo atsutil databases -remove
If that doesn´t help, you could give us some more details. Describe the steps you did, before the problem arose. Did you try to install additional fonts? What fonts do you see in the three main font folders (/System/Library/Fonts/, /Library/Fonts/ and ~/Library/Fonts/)?
