Been testing different methods and this one seems to work. Since I have no experience with changing languages, I'd need you to try it. You might find it less complicated than you outlined above.
FossaPup64 9.5.
-boot system
-make custom changes
-install nicOS-Utility-Suite-2022.pet
-delete all files in /mnt/home/puppylivecdbuild
-reboot (create save file or folder during shutdown)
-Menu>Utility>nicOS-Utility_Suite
-check Save2SFS
-click OK
-check Choose Work Area, Save to ydrv, Exclude existing adrv and ydrv
-click OK
-choose your work area
-click OK
Be prepared to wait. When it's complete, the work area directory will open
containing: ydrv_fossapup64_9.5.sfs
-move the ydrv file to /mnt/home/puppylivecdbuild
NOTE: you can also add any extra files you want on the DVD by copying them into /mnt/home/puppylivecdbuild
-reboot WITHOUT save file or folder
-make no settings
-Menu>Setup>Remaster Puppy liveCD
--at the directory already exist message, click Keep
--at the /tmp/root message click OK
--at the /tmp/etc message click NO
One advantage of this method is all changes are in the ydrv, so if you need to change your custom settings, leave all the files in /mnt/home/puppylivecdbuild and just create a new ydrv and replace the one in /mnt/home/puppylivecdbuild.
When you run Menu>Setup>Remaster Puppy liveCD again it will jump right to the ISO creation step.
wizard