I know that some may already do this, however, I worked out how to update
English Wikisource's call of the images of authors for the template, and
already we have added an extra 2k+ of images without manual effort (if
categorisation is to be believed).
You can see my efforts in [[s:en:Template:Author]] if you are looking to do
something similar.
I hope that makes sense. :-)
Regards, Billinghurst