Prestashop - fields_value added only single char - prestashop

Question

I have problem with prestashop and form helper. I have form with two input text, i could add default value with fields_value. Unfortunately it doesn't work. My form:
public function displayForm()
{
$default_lang = (int)Configuration::get('PS_LANG_DEFAULT');
$fields_form = array();
$fields_form[0]['form'] = array(
'legend' => array(
'title' => $this->l('My module settings')
),
'input' => array(
array(
'type' => 'text',
'label' => $this->l('Box Description: '),
'name' => 'description',
'lang' => true,
),
array(
'type' => 'text',
'label' => $this->l('Box Description: '),
'name' => 'test_name',
'lang' => true,
)
),
'submit' => array(
'title' => $this->l('Save'),
'class' => 'btn btn-default pull-right'
)
);
$languages = Language::getLanguages();
$helper = new HelperForm();
$helper->module = $this;
$helper->name_controller = $this->name;
$helper->currentIndex = AdminController::$currentIndex.'&configure='.$this->name;
$helper->token = Tools::getAdminTokenLite('AdminModules');
$helper->default_form_language = $default_lang;
$helper->allow_employee_form_lang = $default_lang;
$helper->languages = $this->context->controller->getLanguages();
$helper->title = $this->l('tester2');
$helper->show_toolbar = true; // false -> remove toolbar
$helper->toolbar_scroll = true; // yes - > Toolbar is always visible on the top of the screen.
$helper->submit_action = 'homepage_settings';
$helper->tpl_vars = array(
'fields_value' => array('description' => $this->l('hello'), 'test_name' => 'tester2'),
'languages' => $this->context->controller->getLanguages(),
'id_language' => $this->context->language->id
);
return $helper->generateForm($fields_form);
}
When i install module, and go to module configuration then i see 2 form input text with single char instead my text
What am I doing wrong? Next question is what i can do, to my module to make my module work in multi store mode? In the final version, the data in the form will be supplemented from the database, but I want to find out why it does not complete the fields with the whole text.

Answer 1

Your fields are multi languages.
try this:
'fields_value' => array(
'description' => array(1 => $this->l('hello')), 'test_name' => array(1 => 'tester2')),