This is a tangent but I sometimes have to review Swedish books in case anyone might want to publish them in English and after a bit I found I was constantly saying "but there is no difference between the voices of the different characters" and eventually I started wondering if that was a thing anyone other than me cared about so I am glad to see it is a thing that someone else reacts to.

It might be that I'm not picking up on nuances in the Swedish or that it's something that isn't expected in Nordic literature maybe and I am imposing English criteria on it though. But thing I notice, yes.