I'm not sure if this will work for you. I tried it in LM14 Cinnamon - it worked for me.
If you can open a terminal, enter:
- Code: Select all
gsettings set org.gnome.desktop.interface font-name 'Sans 10'
If it works initially, you may still then have to go back to Cinnamon Settings > Fonts and set the default font back to Sans 10 there as well.