Prestashop1.7 cookies for storing vietnamese char

[roheta]

Hello,

I am facing issue to store  vietnamese char in prestashop 1.7 cookies 

i am trying to store Name : Push Climbing | Nguyễn Văn Hưởng, Quận 2, in cookies 

$this->context->cookie->__set('selectedname', $selectedName['name']);

but it throws "Forbidden chars in cookie" error 

so i tried to the below code 

$newname = preg_replace('/[^\w\sæøåÆØÅöôÖÔ]/iu',"", $selectedName['name']);

but still no luck.. can smeone help me here plz ..