I've had the Google translate app for some time, but this trip I discovered its camera mode and, ever since, we have been marveling over the real time translation when viewed through the camera. Just point the camera at something (say, a box of milk or jar of jam - or some befuddling park sign) and see the words morph into the target language right before our eyes. (We are careful to NOT be doing this while the locals are hurriedly trying to do their grocery shopping!)
Yes, you can still snap a photo of the sign or label and perform the standard text-mode translation, but this new (to me) photo mode is just magical. Do not actually snap the photo -- you will see the scene live on your screen but the words (mostly) change as if reprinted on the object.
Sure it can be a little quirky but for languages such as we've encountered in Prague and, now, Budapest, this has been a real help. In Spain the app even suggested that we were seeing a sign that used Catalan rather than Spanish.
Be sure to download your area's language when you're on Wifi and you'll be good to go -- NO cell data usage for this when used while you're out and about.