Import Content Type produces error when content has multilingual thingie

Importing Content type via admin UI, produces these errors:

warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'bu_page_node_form' not found or invalid function name in E:\xampp\htdocs\drupal\includes\form.inc on line 378.
An illegal choice has been detected. Please contact the site administrator.

How to produce it:
Install modules: translation_management, languageicons, l10n_client, i18n

Here's the CCK definition

$content['type']  = array (
  'name' => 'BU Page',
  'type' => 'bu_page',
  'description' => 'A <em>BU Page</em>, similar in form to a <em>story</em>, is a simple method for creating and displaying information that rarely changes, such as an "About us" section of a website. By default, a <em>page</em> entry does not allow visitor comments and is not featured on the site\'s initial home page.',
  'title_label' => 'Title',
  'body_label' => 'Body',
  'min_word_count' => '0',
  'help' => '',
  'node_options' => array (
    'status' => true,
    'promote' => false,
    'sticky' => false,
    'revision' => false,
  ),
  'language_content_type' => 0,
  'old_type' => 'bu_page',
  'orig_type' => 'bu_page',
  'module' => 'node',
  'custom' => '1',
  'modified' => '1',
  'locked' => '0',
  'comment' => 0,
  'comment_default_mode' => 4,
  'comment_default_order' => 1,
  'comment_default_per_page' => 50,
  'comment_controls' => 3,
  'comment_anonymous' => 0,
  'comment_subject_field' => 1,
  'comment_preview' => 1,
  'comment_form_location' => 0,
  'i18n_newnode_current' => 0,
  'i18n_required_node' => 0,
  'i18n_lock_node' => 0,
  'i18n_node' => 1,
  'i18nsync_nodeapi' => array (
    'name' => false,
    'status' => false,
    'promote' => false,
    'moderate' => false,
    'sticky' => false,
    'revision' => false,
    'parent' => false,
    'taxonomy' => false,
    'comment' => false,
  ),
  'icl_content_node_type_fields' => array (
    'title' => true,
    'body' => true,
    'log' => false,
    'name' => false,
    'date' => false,
    'link_title' => false,
  )
);