How to translate strings used in default GtkAboutDialog?

[araruna (Arthur Araruna)]

The default project created by Gnome Builder calls the function gtk_show_about_dialog setting the content by using properties.

The application I’m developping is supposed to be in Portuguese, but I can’t seem to find where to override these strings (such as the button labels: “About” and “Credits”, and others).

How can I do this? Is there a file to edit, or a configuration to change, or even some function I should call?

[gkarsay (Gabor Karsay)]

Actually everything should be already translated.

I get this launching LANGUAGE=pt_PT ./gtkabout

Source code:

/* Compile:
 * gcc $(pkg-config --cflags gtk+-3.0) -o gtkabout gtkabout.c $(pkg-config --libs gtk+-3.0) */
#include <gtk/gtk.h>

static void
show_about (GtkWidget *widget,
            gpointer   data)
{
  GtkWindow *parent = GTK_WINDOW (data);
  const gchar *authors[] = {"Me and Bobby McGee", NULL};
  gtk_show_about_dialog (parent,
                         "authors", authors,
                         NULL);
}

static void
activate (GtkApplication *app,
          gpointer        user_data)
{
  GtkWidget *window;
  GtkWidget *button;

  window = gtk_application_window_new (app);
  gtk_window_set_title (GTK_WINDOW (window), "Window");
  gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);

  button = gtk_button_new_with_label ("Show About Dialog");
  g_signal_connect (button, "clicked", G_CALLBACK (show_about), window);
  gtk_container_add (GTK_CONTAINER (window), button);
  gtk_widget_show_all (window);

  gtk_window_present (GTK_WINDOW (window));
}

int
main (int    argc,
      char **argv)
{
  GtkApplication *app;
  int status;

  app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
  status = g_application_run (G_APPLICATION (app), argc, argv);
  g_object_unref (app);

  return status;
}

[Mejans]

Hello!
It should be translated but this is not the case.
I reported the same with Occitan and Amberol here:
https://gitlab.gnome.org/World/amberol/-/issues/217

[araruna (Arthur Araruna)]

Now that I saw these answers, I believe the difference lies in that your example is made to be compiled and executed as a native executable, but it seems that Gnome Builder does it through flatpak (and I can’t find how to change this), so maybe from the flatpak it only uses the “en_*” or the “C” locale.

I’ll try to set this env variable from Builder and see if it changes anything.

EDIT: No… nothing has changed. I tried to set both LANGUAGES and LANG and none made any difference.

[gkarsay (Gabor Karsay)]

I could reproduce this with the Flatpak version of @ebassi 's Amberol. Locale is de_AT, the 2 strings “About” and “Credits” are not translated:

However, if built from source, the 2 strings are translated:

So this seems to be Flatpak / runtime related.

[Mejans]

Thanks you, I feel less alone.

[ebassi (Emmanuele Bassi)]

It’s very odd, because “About” and “Credits” come from the same place that translates the license identifier, and that one gets correctly localised.

[gkarsay (Gabor Karsay)]

This happens only in runtime 42 and everything is okay with the nightly runtime:

$ flatpak remote-add --if-not-exists gnome-nightly https://nightly.gnome.org/gnome-nightly.flatpakrepo
$ flatpak install gnome-nightly org.gnome.Platform
$ flatpak run --runtime-version=master io.bassi.Amberol

Probably fixed with this commit: https://gitlab.gnome.org/GNOME/gtk/-/commit/19fb336c398aaea851d8d991c9c804e89299ad0d