Stumbled upon this, maybe of interest to you. It is for Ubuntu, but who knows if it might shed some light on your problem.
https://help.ubuntu.com/community/Locale
The problem stems from poorly maintained packages it appears.
I sent an email to Michael Vogt, the maintainer for Synaptic, 2 days ago but I have not received a reply.
The problems I observed with Synaptic were reported on the 1/4/2012 (April Fool's day, but it's not a joke) which you can see on the following page. That was over 2 years ago and nothing has been done about it which is pretty damn poor.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666872I have been in communicaton with Alejandro who mentioned that most of the minor desktops have translation issues. He recommended using XFCE as it has very good translations.
At the very least, it appears that the .po, and hence .mo, files need to be rebuilt.
Otherwise the applications need to be modified to allow updated .po and .mo, files need to be built. This is what I would like to do but I need some pointers to get me started.
For example, I think the lxpolkit.po file needs to include entries such as follows. Otherwise, polkit-gnome-1.po may need an update (
http://forum.lxde.org/viewtopic.php?f=1&t=36823).
msgid "Authentication is required to run the %s."
msgstr "Se requiere autenticación para ejecutar el %s."
%s is a String Parameter placeholder for passing the name of the application that requires the administrative password before it will allow a User to interact with it.
When I click on the Menu item to open Synaptic, an Authentication window is opened, requesting a password, in which all the text is Spanish except the prompt text which is "Authentication is required to run the Synaptic Package Manager".
The command line for starting synaptic is synaptic-pkexec. Alejandro suggested using "gksu synaptic" instead which uses a different dialogue window which displays a text entry field for the Administrative password but does not display the current User as does the dialogue window for synaptic-pkexec (I think that pkexec is an abbreviation for Policy Kit Execution). The dialogue window, opend by gksu, is properly translated.
Regarding the dialogue window for configuring the Repositories, Alejandro suggested to deinstall the software-properties-gtk package so that Synaptic used its own Repositories interface which does not appear to have any translation issues.
This leads me to ask why was the software-properties-gtk package included in wattOS? Does it have advantages over the standard Repositories interface?
Last night, I also discovered that the Openbox Configuration Administrator window suffers from the same problems. Very disappointing.
So, we have 3 or 4 packages that need updating - Update Manager, Synaptic, pkexec (lxpolkit) and Openbox Configuration Administrator.
Hasta luego, Michael.