Add Water is now available for translation in Damned Lies, as part of the Other Apps set. 
I’m in the process of making a couple big changes to the UI (strings included) but I have no ETA for that. When that materializes, I’ll announce here two weeks prior to release.
Cool stuff!
On the DL page, it says
There are some missing files from POTFILES.in:
data/gtk/profile-selector.ui
src/gui/option_factory.py
Just wanted to make sure this is known
This was fixed today, don’t worry. I’m not sure why it hasn’t updated on the module page yet.
There was a lock on the update, but it’s been sorted out now!