If it could be useful, launching it using LANG=C works.
alessandro@whisper:~$ echo $LANG it_IT.UTF-8 alessandro@whisper:~$ xchat-gnome XChat CRITICAL *** default event text failed to build! Aborted (core dumped)
alessandro@whisper:~$ LANG=C xchat-gnome (this one works)
If it could be useful, launching it using LANG=C works.
alessandro@ whisper: ~$ echo $LANG whisper: ~$ xchat-gnome
it_IT.UTF-8
alessandro@
XChat CRITICAL *** default event text failed to build!
Aborted (core dumped)
alessandro@ whisper: ~$ LANG=C xchat-gnome
(this one works)