Update node and all translations programmatically

Question

I need to add tags as taxonomy terms to already created nodes in 7 languages.

If I do this:

$node = Node::load($nid);
$node->set('field_tags', getTerms($terms));
$node->save();

Just default node in English is updated, however, all terms are created in all languages.

getTerms() - is my own function, which is getting term ids and creating them if they don't exist.

I need to update all node translations. But how?

Tried this:

foreach (getLanguages() as $key => $value) {
  $node_translation = $node->addTranslation($key, $node->toArray());
  $node_translation->set('field_tags', getTerms($terms));
  $node_translation->save();
}

Gives me this error: [error] Invalid translation language (ru) specified. But 'ru' language is active.

getLanguages() - return array of all languages. The same function is used to create nodes and terms and it's working fine there.

How to update a node and all its translations?

Answer 1

Finally found the right solution to update node translation programmatically:

if ($node->hasTranslation($key)) {
  $translation = $node->getTranslation($key);
  $translation->set('field_tags', $terms);
  $translation->save();
}

$key - language tag, for example 'en', 'es', 'ru', etc.