FieldTestEntityHooks.php

<?php

declare (strict_types=1);
namespace Drupal\field_test\Hook;

use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for field_test.
 */
class FieldTestEntityHooks {
    
    /**
     * Implements hook_entity_type_alter().
     */
    public function entityTypeAlter(array &$entity_types) : void {
        
        /** @var \Drupal\Core\Entity\EntityTypeInterface[] $entity_types */
        foreach (field_test_entity_info_translatable() as $entity_type => $translatable) {
            $entity_types[$entity_type]->set('translatable', $translatable);
        }
    }

}