I think the translator is a neat idea in theory. Not something I'll spend money on under any circumstances, but neat, and fits a kind of "edutainment" mindset.
We've always known that merchandise for Pandora was going to be a bit of a struggle. I'm not going to fault Disney for trying some weird things, and I'm certainly not going to compare their efforts to Universal's Harry Potter stuff, because that's not productive in any way. That topic has been beaten to death like the proverbial dead horse.