It's a pity, but these problems were not corrected until now (we just tried
9.4.4). The error messages still contain the same unprintable (in Latin9)
characters.
Please translation team, could you look for this (here in Germany very
heavy) problem?
By the way, we found a way to help us:
We just rename the language directory share/locale/de to
share/locale/de-nix, so Postgresql cannot find the correct language files
and we get english error messages.
Regards
Walter Willmertinger