Upon reaching level 4, I noticed that the models you used to visually depict Isabella, Oliver, et. al. are the same as the previous levels, but their voices have most definitely changed! Those aren't the same actors voicing the dialogs as before! So, would anyone at Fluenz like to satisfy this user's curiosity? Was there a functional reason for making this change? I noticed also in level 4 that the dialogs are closer to "normal speech" that the previous levels. Was that why the voices changed?