Html::decodeEntities() must be of the type string

Thanks for the finding. You are the first one having problems with the notation in the module. Could you be a little more specific, what kind of data you try to translate or when the error happens (maybe you could add a debug breakpoint before).

Do you also have this problem with the tmgmt_google module - this uses the same logic as tmgmt_deepl.

I'll check your patch and bring it in the next release of the module (looks fine so far)..

Hi Dima,

Thanks for clarification. In this case it would make more sense, to declare this field as being non-translatable.
Just use the hook_tmgmt_translatable_fields_alter to remove those fields from your translatable fields like shown in the example:

/**
 * Implements hook_tmgmt_translatable_fields_alter().
 */
function custom_module_tmgmt_translatable_fields_alter(ContentEntityInterface $entity, array &$translatable_fields): void {
  // No translation for following fields.
  $not_translatable_fields = ['field_mask_icon', 'field_my_custom_field'];

  foreach ($translatable_fields as $field_name => $translatable_field) {
    // Unset fields that won't be available in translation.
    if (in_array($field_name, $not_translatable_fields)) {
      unset($translatable_fields[$field_name]);
    }
  }
}

You can use unset here or just set #translatable to false.

@dima.iluschenko:
You are right. The patch was already applied to the latest version of the module.
https://git.drupalcode.org/project/tmgmt_deepl/-/tree/2.1.9

Thanks for the finding.