This is a simple one-liner that uses feh to run a slideshow for mum:
#! /bin/bash cd /home/guiplug/Pictures/from_ray && \ feh . \ -e "FreeSans/24" \ --caption-path ./captions \ -C '/usr/share/fonts/truetype/freefont' \ -g 800x600 \ --cycle-once \ --slideshow-delay 30
I recorded the captions 'on the fly', one time when mum and I were looking at the photos together:
The man pages are good if you want to explore the options further.