I'm from suriname
and I know dutch people speak dutch through their noses
Anyhow, since this thread is to die now that the actual chapter is out, yup, some loirinhas are descendants from german people, specially people from the southern part of Brazil. But that doesn't really mean they speak any german nor dutch.
The catching him of guard theory makes sense because that one osaka guy sniped away most of his body and he was just a head for a long time before regenerating.