[darren_]

> GP’s question was whether the app will still save your queries and submit them once a connection becomes available just to scratch that data collection itch.

disclaimer: googler

This can be tested. Translate shows up in your Google 'My Activity' page, so you can do some offline translations, then switch the network back on, and see if the translations show up in My Activity. Assuming you can trust the My Activity page to be complete and accurate (my opinion is you can, but i would say that)

and FTR: I've actually just tried it and offline translations do not show up in my activity so I highly doubt they're being surreptitiously uploaded.