According to the wiki page updates, the GNOME Goal #1 fixed by Vincent is working nicely. One small issue though is the use of the g_option_context_new() description.
The description of parameter_string has been updated for that
At the moment people use different variants: "- Description", "Description", "[arg]","App Name", "" ... some coherence would be nice.
What about using "- Comment from .desktop" by example? Maybe using g_strdup_printf("- %s", ...) to use the existant translations for the comment?