Implements hook_field_info_alter().
function translation_entity_field_info_alter(&$info) {
foreach ($info as $field_type => &$field_type_info) {
// By default no column has to be synchronized.
$field_type_info['settings'] += array(
'translation_sync' => FALSE,
);
// Synchronization can be enabled per instance.
$field_type_info['instance_settings'] += array(
'translation_sync' => FALSE,
);
}
}