The pronunciation in Wozzol is not always equally good. It can be a bit difficult to get the pronunciation working properly. If you are using Wozzol via www.wozzol.nl the pronunciation will be performed by the browser. This works best in Chrome. If you want to make use of this feature, it would be best to use Chrome as your browser. In the Android app and the Apple app the pronunciation is performed by the text-to-speech engine of either Android or Apple. If this doesn't work well you can use the settings to choose a different text-to-speech engine or you can download extra voices for better quality or a better accent. Wozzol premium users have the option of changing the speed of the speech through the settings.