The library I worked for as a teen used to process off-site reservations by writing them to a text file, which was automatically e-faxed to all locations every odd day.
If you worked at not-the-main-location, you couldn’t do an off-site reservation, so on even days, you would print your list and fax it to the main site, who would re-enter it into the system.
This was 2005. And yes, it broke every month with an odd number of days.
It’s literally one Google search away. And if they want to travel, you’ll be able to speak English to basically everyone (under 40)