The following code help displaying a warning message and redirect to the site home page if a node translation does not exist. Create a custom module and implement the hook_init() method as follow.
custom.module
/**
* Implementation of hook_init()
*
* Handle the case when the current language does not match content node language.
* Reference: http://drupal.org/node/274761#comment-909800
*/
function custom_init() {
if (arg(0) == 'node' && is_numeric(arg(1))) {
$node = node_load(arg(1));
// if current language does not match content node language
global $language;
if (!empty($node->language) && $node->language != $language->language) {
// lookup translations for current node
$translations = translation_node_get_translations($node->tnid);
// redirect if there's a translation in the currently active language
if (isset($translations[$language->language])) {
drupal_goto('node/' . $translations[$language->language]->nid);
break;
}
// else display locale front_page and display "page not yet translated" message
else {
$url = referer_uri() ? referer_uri() : 'javascript:history.go(-1)';
$msg = t('Sorry, the page %title is not available in @language. ' . '<a href="!url" title="Return to the previous page">Go Back!</a>',
array('%title' => $node->title, '@language' => $language->native, '!url' => $url));
drupal_set_message($msg, 'warning');
drupal_goto(variable_get('site_frontpage', 'node'), null, null, 307);
break;
}
}
}
}
Done =)
Reference: Handling missing translations
Eureka! 
I’ve made a module with this code. I’d like this module to redirect to the homepage of the selected language if the node has no translation and I think the module is supposed to do that… But when I switch from a node to another with the language switcher this doesn’t work…
Maybe because I have node with clean urls?
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Hi Michel,
it should work even you have enabled clean urls. so what did u get when u switch the language when viewing a node which does not have a corresponding translation?
Kit
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