Google Translate's site for desktop and mobile now shows suggestions and autocompletes your text, much like Google Search. This works for English, French, Italian, Spanish, German, Portuguese, but you have to manually pick the input language instead of relying on automatic detection.
The new feature helps you translate faster common phrases, words and expressions, but it's not very useful for long texts.
For example, I picked French as the input language, typed "k" and one of the suggestions was "kinésithérapeute", which means "physiotherapist".
It also works when you use the mobile site:
{ Thanks, Emanuele Bartolomucci. }