elk-herd 3.0 will do pretty much exactly this for Digitakt. The beta release should be out next week and supports importing patterns from one Digitakt project into another, bringing along all required samples and sounds, and renumbering all track sample slots and plocks so everything still plays the same.
The elk-herd 3.0 alpha that is out will let you do this for Digitakt. You transfer the project from your DT to the computer, rename patterns (and re-order them - as well as sample and sound pool reordering), and then send it back to the DT.
You can find it here: Elk-herd 3.0 public alpha
I estimate it would take me about two to three months per device. I have an Analog Rytm, but it is a much more complex structure so I’m not sure if I’ll do that next. If I had a Digitone, that would probably be pretty close in feel to the DT.