http://l10n.gnome.org/module/galeon/ says:

warn  	There are some missing files from POTFILES.in:

    * mozilla/GeckoPrintService.cpp
    * mozilla/GeckoPrintSession.cpp
    * ui/print-tab.xml

error 	Following files are referenced in either POTFILES.in or POTFILES.skip, yet they don't exist:

    * ui/print.glade

error 	Error regenerating POT file for galeon:

intltool-update -g 'galeon' -p
can't open ./../ui/print.glade: No such file or directory at /usr/local/bin/intltool-extract line 212.
xgettext: error while opening "../ui/print.glade.h" for reading: No such file or directory
ERROR: xgettext failed to generate PO template file. Please consult
       error message above if there is any.

I'm not sure if this project is still alive, if so, please fix this :)