Add Pronounciation/Speaking to LENGO intervention/interruption

The Lengo Integration deserves some love, because it is a great feature! To learn broader and more effectively, it would be nice, if

• in the existing Intervention/ Interruption: users would be able to listen to the correct pronunciation of the vocabulary

• and if there would be another Intervention/Interruption type added: in which you have to listen to or speak to answer the vocab questions.