Comment 1 for bug 346363

I've noticed that gnome-language-selector also fails if the initial content of /etc/default/locale is

LANG="C"

That can happen in a manual install, since some people prefer to avoid the heavyweight locales by default, but I don't think it would ever affect a live image style install.

/usr/lib/python2.6/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py:837: GtkWarning: gtk_cell_view_set_cell_data: assertion `cell_view->priv->displayed_row != NULL' failed
  cell = combo.get_child().get_cell_renderers()[0]
/usr/lib/python2.6/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py:804: GtkWarning: gtk_cell_view_set_cell_data: assertion `cell_view->priv->displayed_row != NULL' failed
  cell = combo.get_child().get_cell_renderers()[0]
Traceback (most recent call last):
  File "/usr/bin/gnome-language-selector", line 34, in <module>
    options=options)
  File "/usr/lib/python2.6/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 172, in __init__
    self.updateSystemDefaultCombo()
  File "/usr/lib/python2.6/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 58, in wrapper
    res = f(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 815, in updateSystemDefaultCombo
    defaultLangName = self._localeinfo.translate(defaultLangCode)
  File "/usr/lib/python2.6/dist-packages/LanguageSelector/LocaleInfo.py", line 148, in translate
    return self.translate_language(locale)
  File "/usr/lib/python2.6/dist-packages/LanguageSelector/LocaleInfo.py", line 110, in translate_language
    lang_name = gettext.dgettext('iso_639', self._lang[lang])
KeyError: 'C'