In this not so  recent blog post the guys in Google research describe a bit of how to put neural networks in your phone for translation. without access to the cloud, phew!  
For 27 languages.

the picture is not very impressive, after all everyone knows that cookies are cookies, but it shows the main issues for image recognition of the letters: look at the chocolate chips pretending to be letters...
The more marketing version of the blog post is in
and it also gives a few details on their community in Translate Community, a big of a game of improving their translations, similar in looks to