We have this lovely automatic translation feature in the Wishlist, but I suspect few use it because they don't know it exists. One must first "Enable automatic machine translation in the Community Wishlist" in their preferences.
In r1074094, I moved this to be a preference to match the opt-in behaviour it had when it was a gadget. I thought this was needed because users complained about the translation banner being there on every wishlist page, but @Samwilson corrected me that this was actually due to over-use as a default feature (T384555).
That said, I guess we'd still be worried about making it default-on again? What if it was limited to logged-in users only?