DecisionLock entity language on edit forms


Editors new to Drupal often try to translate content by changing the language on existing content, causing confusion for site visitors.

Table Of Contents


Projects where Content Translation is enabled will use the following configuration when setting up translatability of content entities:

  • Step 1: Expose Language selector on entity forms:

Navigate to Configuration -> Regional and Language -> Content language and translation and check "Show language selector on create and edit pages"

  • Step 2: Use a form alter in custom code to prevent it from being changed when the entity is being edited. This can be accomplished with code similar to the one below:
 * Implements hook_form_BASE_FORM_ID_alter() for node_form.
function mymodule_form_node_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  /** @var \Drupal\node\NodeInterface $node */
  $node = $form_state->getFormObject()->getEntity();
  // Disable the language dropdown if this is an edit operation.
  if (!$node->isNew() && isset($form['langcode']['widget'][0]['value'])) {
    $form['langcode']['widget'][0]['value']['#disabled'] = TRUE;

It's possible this behavior changes in the future, below are a few feature requests to change this in Drupal core:


We will reduce chances of editors inadvertently changing the language of existing content when they intend to create a new translation.

Andrew Berry, Marcos Cano

Decided on