Form submission handler for element added with translation_entity_language_configuration_element_process().
Stores the entity translation settings.
translation_entity_language_configuration_element_validate()
function translation_entity_language_configuration_element_submit(array $form, array &$form_state) {
$key = $form_state['translation_entity']['key'];
$context = $form_state['language'][$key];
$enabled = $form_state['values'][$key]['translation_entity'];
if (translation_entity_enabled($context['entity_type'], $context['bundle']) != $enabled) {
translation_entity_set_config($context['entity_type'], $context['bundle'], 'enabled', $enabled);
entity_info_cache_clear();
menu_router_rebuild();
}
}