Pipes (like much of UNIX) are stuck in ASCII. The response encoding has no relationship to your UNIX locale. The response would know the encoding but can't pass

Pipes (like much of UNIX) are stuck in ASCII. The response encoding has no relationship to your UNIX locale. The response would know the encoding but can't pass it on to the pipe because it's a concept from the 70ies. In the end all of this only works as long as everybody keeps to ASCII.