Rosetta Stone® Fluency Builder With Rosetta Stone® Fluency Builder you can increase your language skills up to a professional level in a most attractive learning environment. Rosetta Stone® Fluency Builder is the second part of the Rosetta Stone® Catalyst Licence. it is designed to deepen the languages listed below to a professional level in a varied and engaging way. This makes it the ideal supplement to the advanced language courses from GER level B2 to C2 of the University of St. Gallen. Content While the relaxed, varied nature of the Rosetta Stone® Foundationis is also felt in Fluency Builder, the tutorial has been supplemented with grammatical explanations and exercises, adding considerable depth. Language offer in Rosetta Stone® Fluency Builder German French Spanish (Spain) English (Brit.) Italian Spanish (Latin America) English (US) Rosetta Stone® Fluency Builder is a browser-based software, which were programmed in a responsive design, which means that you can learn languages wherever you want, be it at home withyour computer, on the bus with your smartphone or on the train with your tablet. As long as you have at least a headphone or a headset with microphone, there are no limits to your learning pleasure. Rosetta Stone® Fluency Builder offers an app for Android and iOS. As with Rosetta Stone® Foundation, the content of the app corresponds to that of the PC learning resource and enables you to learn while you're on the move.