Hi, I'm part of the Eternum translator community and I'm happy that you're considering becoming a translator! You can do the vast majority of the work on just an Android device, but you'd need someone with a PC to provide you with the necessary files, though I think that can be arranged.
However, unless you're the only one creating a translation for the language of your choice, there will be additional challenges in coordinating the translation effort with your peers. So it depends, really.
Even if you don't support Caribdis monetarily, you can still join his server, just without posting permissions. You can still find me there via the search functionality, DM me, and discuss further details if you like.