There are sites which list fonts: try
https://www.dafont.com/mtheme.php?id=1
https://www.whatfontis.com/all-fonts.html
and smaller collections like
https://fontlibrary.org/
These will usually state if free-to-use and/or non-commercial use, you need to check out if required.
Google fonts is a big collection, not so many fancy types but good, free to use fonts.
https://fonts.google.com/ and you can download the whole lot if you search
https://github.com/google/fonts
Using linux and Gimp 2.10 your fonts go in ~/.config/GIMP/2.10/fonts/ but an alternative is your home partition in ~/.fonts/
Edit:
Quote: I want to install a lot of fonts.
Never a good idea, Easy enough in Linux to move font files in-and-out of your Gimp profile with a 2-pane file browser. No need to restart Gimp there is a refresh icon bottom of the Fonts dock.
An alternative is Ofnuts plugin to manage resources see:
http://gimp-tools.sourceforge.net/managementtools.shtml
the download is about 30 down:
https://sourceforge.net/projects/gimp-to...s/scripts/ dated 2013-05-26
Edit again
Just checking that
addonCollectionManager-3.0.py does work with Gimp 2.10.0
Added folder
fonts_storage in the Gimp profile.
Added some folders with font collections (ttf/otf) to
fonts_storage
Seems to work:
https://i.imgur.com/Lzyh8ns.jpg that is a right-click in the fonts dock.
Zipped collections should work as well, the Gimp flatpak added ok but not too keen on removing. Needs investigation.