Word Lens, translator camera love, Microsoft has you covered. Using their Bing Translator App, you can point your phone at text and the augmented reality translation will appear over the original words. Unlike Google Translate, the Windows Phone translation app can offline, if you cache the language packs. There is also no need to cough up the five bucks required for Word Lens. The real time translation app is free and it supports two more languages than Word Lens (Chinese and German, on top of: English, Spanish, French, and Italian).
Source: Windows Phone The Verge