Localize your apps with Google Translator Toolkit
Google Translator Toolkit has launched support for four new translation-related file formats: Android Resource (.xml) Application Resource Bundle (.arb) Chrome Extension (.json) GNU gettext-based (.po) Now you could localize your Android App easily. Source: http://googledevelopers.blogspot.com.br/2012/03/localize-your-apps-and-content-more.html