Form with POST return null

Hi ,
I have a form with methop post it send the data from the form when put input, but when I do the 
$request->getPost('idiomas') it returns a null.

I have tried with method get and it works but I need to do it in post.

This what the headers infow show me

This is how I create the route

PHP Code:

$routes->post('{locale}/app/admin/edit', 'Editor::edit', ['namespace' => 'App\Controllers\Appmudet\Admin']); 


And this is the form in html

Code:

<form action="/es/app/admin/edit" method="post">

This is the edit function 

PHP Code:

public function edit(){
        
        var_dump($this->request->getPost('idiomas'));


    } 


Did you try using a matched route?

PHP Code:

$routes->match(['get', 'post'], '{locale}/app/admin/edit', 'Editor::edit', ['namespace' => 'App\Controllers\Appmudet\Admin']); 


What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

Did you try using a matched route?

PHP Code:

$routes->match(['get', 'post'], '{locale}/app/admin/edit', 'Editor::edit', ['namespace' => 'App\Controllers\Appmudet\Admin']); 


Yes I have tried it, and the var_dump still show me a NULL

https://codeigniter4.github.io/CodeIgnit...aceholders

! Note:
{locale} cannot be used as a placeholder or other part of the route, as it is reserved for use in localization.

https://codeigniter4.github.io/CodeIgnit...aceholders

! Note:
{locale} cannot be used as a placeholder or other part of the route, as it is reserved for use in localization.

I have used it in every route of my web  and it works, I also tried to write the ulr without {locale}, and still dosen't work

In Routes
The second method uses a custom placeholder to detect the desired locale and set it on the Request. The placeholder 

Code:

{locale}

 can be placed as a segment in your route. If present, the contents of the matching segment will be your locale:

PHP Code:

$routes->get('{locale}/books','App\Books::index');