My relationship is not working?

When i write this code my relationship is not working. How can i write this part of code so that i can access to $article->translations(). Any suggestion?

 $date_number = strval(date('m', strtotime($month)));
      $articles = DB::table('articles')->whereRaw('MONTH(created_at) ='.$date_number)->where('approved',1)->get();

foreach($articles as $article){
    $article->trans = $article->translations()->whereHas('language',function($query) use($current_language_id){
      $query->where('id','=',$current_language_id);
    })->first();
  }

via Chebli Mohamed