Prolog .pl files are shown as Perl files, both in files browser and in Geany/Gedit syntax-highlighting. Is there a way to let it recognized Prolog files as non Perl files?
Perl highlighting can be removed in Geany by choosing
Tools -> Configuration Files -> filetype_extensions.conf from the menu bar. In the file that is opened, remove
*.pl; from the Perl line, then choose
Tools -> Reload Configuration to apply. This will also remove Perl highlighting from actual Perl files with that extension.
Geany doesn't have any highlighting for Prolog, though it is on the plugin wishlist.