http://blogs.skype.com/2014/12/15/skype-translator-preview-an-exciting-journey-to-a-new-chapter-in-communication/

"Today, we are excited to announce the first phase of the Skype Translator preview program. The preview program will kick-off with two spoken languages, Spanish and English, and 40+ instant messaging languages will be available to Skype customers who have signed-up via the Skype Translator sign-up page and are using Windows 8.1 on the desktop or device."

There's a video of it in action with two schools one in the US and one in Mexico.

https://www.youtube.com/watch?v=G87pHe6mP0I

One can register for the Skype Translator Preview at http://www.skype.com/en/translator-preview/

There is also a Infographic describing how Skype Translator works:

http://news.microsoft.com/download/presskits/skype/docs/SkypeTranslatorInfo.pdf

and associated technical blog post and video at 

http://blogs.skype.com/2014/12/15/skype-translator-how-it-works/

Kind Regards,

Dev Anand