Get all content in all language using query
Following code should work:

$langcd = \Drupal::languageManager()-&gt;getLanguages();
$langcd = array_keys($langcd);
$query = \Drupal::entityQuery('node')
        -&gt;condition('status', 1)
        -&gt;condition('type', 'page');
$query-&gt;condition('langcode', $langcd, 'IN');
$nids = $query-&gt;execute();


Get list of active languages first, then change condition for langcode to IN.