The name for the flag Fishing in the GUI menu for "/rp flag" is not set so it just displays Flag Name, it confuses players and they ask staff again and again about it.
I have been meaning to report this tiny fix for months now, you could include with your next 1.15 update.
Thanks for the good plugin.

it a tiny error translation, you can fix it manually. add this to your gui.conf, for example my gui.conf its called guiES-ES then, you paste this:

gui.flags.fishing.description=&6Descripción: &aPermitir pescar a/n&amiembros y no miembros./n
gui.flags.fishing.name=&e=> Permitir pescar

i think that you will have the same problem with allow-potions, if it is correct, paste this:

gui.flags.allow-potions.description=&6Descripción: &aPermitir que los jugadores usen/n&apociones en esta región/n
gui.flags.allow-potions.name=&e=> Permitir pociones

it will be fixed. :)