Allow Node Language to list all installed languages

+    $options['all_languages']['default'] = 'enabled';

This should be a boolean instead of a string.

+    // Shift the expose button above our options so the form makes more sense.
+    if (!empty($form['expose_button'])) {
+      $form['expose_button']['#weight'] = -2;
+    }
+

Can you explain why this makes more sense?

I think that when the "All" selection is made in the dropdown, that it should populate the Language fieldset with the missing languages. It does currently work but you have to select All, update, then come back to the filter to see the change. Seems somewhat non-intuitive.

I will see if I can work out how to make it dynamic.

So needs work?

Yeah, needs work. I still haven't looked at it but I will tomorrow afternoon.

so

Sooo, I did a fresh install of D6, cvs'd down the latest D6 version of views, enabled Locale, added a couple of languages, disabled one, added a couple of users, added a node, then went to create a view.

While trying to create a filter for User: Language, I get "Error: handler for users > language doesn't exist!"

I am stuck on that, recreating the view doesn't help. Do you get the same result when trying to ad "User: Language"?

This problem remains.

Locale allows to define multiple languages and enable only some:
admin/config/regional/language

This is common when you want to limit the interface say to two languages, but will be having content in other languages as well.
One site may not have the resources to properly translate all of the interface and still accept content contributions in a separate language.

The content translation module allow translating content into languages that are defined (listed) on admin/config/regional/language even if they are disabled.

But the Language filter in views only allows choosing among enabled languages, forcing us to enable all languages for the interface that we want to support filtering the content by.

Patched it to Drupal 7 and added option to show the expose all languages or not.
Still missing the dynamic update once you change from enabled to all or vice verse.

The 5 year old patch in #10 to views_handler_filter_node_language.inc does not apply to the latest views 7.x-3.x-dev.

Checking patch modules/locale/views_handler_filter_node_language.inc...
error: while searching for:
 * @ingroup views_filter_handlers
 */
class views_handler_filter_node_language extends views_handler_filter_in_operator {
  function get_value_options() {
    if (!isset($this->value_options)) {
      $this->value_title = t('Language');

error: patch failed: modules/locale/views_handler_filter_node_language.inc:11
error: modules/locale/views_handler_filter_node_language.inc: patch does not apply