Microsoft today announced that the Microsoft Translator app will be deprecated on older versions of Windows from March 20th. This change affects Windows 8, Windows Phone 7.1 and Windows Phone 8. Microsoft will remove the app from their respective stores and already installed versions will stop functioning on April 30, 2017.
However, Microsoft Translator will be supported on Windows 8.1 and Windows Phone 8.1 through a new update which will be releasing shortly. Users need to ensure their app is updated before April 30, 2017, to ensure it will continue to function. Translator app for Windows 10 PC and Mobile will continue to work as usual. There is no change related to it.