Msghack can be used to alter gettext .po files in ways no sane mind would think
about. It is a reimplementation of the original msghack in Python.

WWW: https://src.fedoraproject.org/rpms/gettext/blob/master/f/msghack.py
WWW: https://src.fedoraproject.org/rpms/gettext/blob/master/f/msghack.1