Doesn't Dutch use the rolled R?
I thought in Dutch you're supposed to speak with a rolled R, but it sounds like this program is using the English R.
In my experience there's a few different r sounds (like in German). Some r sounds are a hard, American like r, also like the English R as well. The TTS though is really bad. Someone posted this video a while ago and it's super cute, it's a Dutch airlines commercial and it gives you an idea of how Dutch is really spoken away from the robot . https://www.youtube.com/watch?v=NK-T_t166TY
There's a lot on the internet to help with how the language sounds like: https://www.youtube.com/channel/UCY0BCa9cKhn-V1W52ALrR5Q