OSTechNix published a guide explaining how to list all installed fonts and how to list installed fonts for a particular language in Linux and Unix systems.
How To Find All Installed Fonts From Commandline In Linux
Do you want to know which fonts are installed on your Linux system? Good! I know a quick way to find all installed fonts in your Linux system from commandline. The fc-list command helps you to list all fonts and styles available on the system for applications using fontconfig.
How To Find All Installed Fonts From Commandline In Linux