Create and translate a multilingual nodes programmatically.

Programmatically create and translate nodes.

Example:

use Drupal\node\Entity\Node;

$node = Node::create([

  // The node entity bundle.

  'type' => 'article',

  'langcode' => 'en',

  'created' => REQUEST_TIME,

  'changed' => REQUEST_TIME,

  // The user ID.

  'uid' => 1,

  'title' => 'My test!',

  // An array with taxonomy terms.

  'field_tags' =>[2],

  'body' => [

    'summary' => '',

    'value' => '<p>The body of my node.</p>',

    'format' => 'full_html',

  ],

]);

$node->save();

\Drupal::service('path.alias_storage')->save("/node/" . $node->id(), "/my/path", "en");

$node_es = $node->addTranslation('es');

$node_es->title = 'Mi prueba!';

$node_es->body->value = '<p>El cuerpo de mi nodo.</p>';

$node_es->body->format = 'full_html';

$node_es->save();

\Drupal::service('path.alias_storage')->save("/node/" . $node->id(), "/mi/ruta", "es");

Note : This example has not checked bu my self.

Example from https://gist.github.com/facine/35bb291811c146b6fc9e

Example 2 :  (Tested)

//use Drupal\node\Entity\Node;

//Create Entity

$entity = \Drupal\node\Entity\Node::create([

  'type' => 'article',

  'title' => "Test Title English"

]);

$entity->save();

//Add French translation

$entity->addTranslation('fr', ['title' => "Title in French"])->save();