Yes, just make a new disk with aARPL-18n, build loader, boot loader and you are good to go.
I just did it, it had to 'migrate' upon booting 7.2.2 though, everything went fine.
Tbh I was just so angry I had to make a new bootloader again, because I thought the arpl 1.1beta2 was going to manage it well, unfortunately it doesn't work with the new DSM versions.