cakephp don't display index action in url

I'm using the following code in my AppHelper.php to inject the language parameter into links created with the HtmlHelper

public function url($url = null, $full = false) {
  if(!isset($url['language']) && isset($this->params['language'])) {
    $url['language'] = $this->params['language'];
  }
  return parent::url($url, $full);
}

It's working fine but when I go to the index action the url becomes something.com/some_controller/index

if I don't override the url method then the url is just something.com/some_controller

These are my routes

Router::connect('/:language/:controller/:action/*',
                   array(),
                   array('language' => 'eng|fra'));

Router::connect('/:language/:controller',
                   array('action' => 'index'),
                   array('language' => 'eng|fra')); 

Router::connect('/:language',
                   array('controller' => 'pages', 'action' => 'display'),
                   array('language' => 'eng|fra'));

I'm calling the link method like this

$this->Html->link(__('Users'), array('controller'=>'users', 'action'=>'index'))';

and I tried it without the action parameter

$this->Html->link(__('Users'), array('controller'=>'users'))';

without the action parameter but it adds the current action if I am on a page managed by the same controller

how can I make it so that the name of the action doesn't become part of the url if it is the index action?

The routes are matched in the order in which you set them. Reverse the order of your Router::connect() statements and you are done. ie. First set route for /:language' then for /:language/:controller' and then /:language/:controller/:action:'

Also overriding AppHelper::url() to include the language in generate url is not needed. Use the 'persist' key in your Router::connect() statements and it will do the job for you.