Allows to exclude some fields from translation with TMGMT.
\Drupal\Core\Entity\ContentEntityInterface $entity: The entity to exclude fields from.
\Drupal\Core\Field\FieldDefinitionInterface[] $translatable_fields: An array of field definitions, keyed by field name.
function hook_tmgmt_translatable_fields_alter(\Drupal\Core\Entity\ContentEntityInterface $entity, array &$translatable_fields) {
if (isset($translatable_fields['title'])) {
unset($translatable_fields['title']);
}
}