It's really up to you. Right now I would guess there will be quite a few little changes here and there. I am trying to add completely new lines at the bottom of the translation files so at least those are a little easier to see.
Although if you start translating now, you might get a faster turn around for fixes.
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2