Why after creating a new route, cleared cache I'm still getting 404 error

in my web.php I have the next code:

Route::group(['prefix' => $prefix, 'middleware'=> 'language'], function() use ($prefix) {
   Route::get(Lang::get('routes.page',[], $prefix) , 'PagesController@index')->name($prefix.'_page'); 
   Route::get(Lang::get('routes.article',[], $prefix) , 'ArticlesController@index')->name($prefix.'_article');

When I'm going to routes.page all it's working.
When I'm going to routes.article I'm getting error 404.
I cleared: route cache, view cache, config cache, but still the same error.
In console when I'm using the command:

php artisan route:list 

Also, I can't see my route registered.
But when instead of 'routes.article' I'm putting 'test', all it's working.

via Chebli Mohamed