Hello Jack,
Thank's for your answer :
$sql_data_array = array('articles_date_available' => $articles_date_available,
'articles_date_added' => $articles_date_available,
'articles_status' => 0,
'authors_id' => $authors_id);
That fixes my issue :
'authors_id' => $authors_id); was written 'authors_id' => ''); (from the file I downloaded).
Every thing is working now except the multiple language option.
Have a good day