- ,,, but as the manual says about [custom filetypes](https://www.geany.org/manual/current/index.html#custom-filetypes) the file should be `filetypes.Xxx.conf` where Xxx is a case sensitive filetype name.
That's interesting. It doesn't explain why there's a filetypes.perl but no filetypes.perl.conf or filetypes.Perl.conf.