Google translate has a feature that can analyze an image and translate text instantly. Why? Because by the time your car passenger finds "interdiction de traverser le pont" in their French-to-English phrase book, your car is already filling up with river water.
For several years, the Google Translate application has been a quick and generally accurate way to decipher foreign languages on the go. Type a sentence, and Google can translate it into any of 65 languages within a few seconds (assuming you have a solid Internet connection). If you want to speak into the phone instead of typing, Google has you covered in any of 17 languages.