Issues/863 makemyisland changes

MakeMyIsland is effectively in production, so it would be nice to no longer be running this on its own branch
I think with the templtaed password phrase changes, having a separate language domain might not be needed. I'm not sure if there's some other obvious place I'm missing, but I can't see it from a quick glance, so any other occurrences might be small enough that they could be made generic instead?