diff --git a/README.md b/README.md
index 2e454cc..00f06fd 100644
--- a/README.md
+++ b/README.md
@@ -78,14 +78,25 @@ Now, I'm on the same page in french http://www.domain.tld/fr/products/12-my-prod
 		'product_slug'		=> '',
 	));
 	
-This creates 2 routes, the default language (english here) is required. If we have a third language like "de", it will use "en". The thing is, both url  http://www.domain.tld/fr/products/12-my-product and http://www.domain.tld/en/produits/12-my-product will still work. To make sure this is not an issue, you should use reverse routing everywhere. With Route::get('product/details')->uri(array('product_id' => 12, 'product_slug' => 'my_product')), you'll get the complete uri with the current language code. To get another language, just pass a second paramter to Route::get('product/details', 'en').
-
+This creates 2 routes named en.products.details and fr.products.details. The default language (english here) is required. If we have a third language like "de", it will use "en". The thing is, both url  http://www.domain.tld/fr/products/12-my-product and http://www.domain.tld/en/produits/12-my-product will still work. To make sure this is not an issue, you should use reverse routing everywhere. With Route::get('product/details')->uri(array('product_id' => 12, 'product_slug' => 'my_product')), you'll get the complete uri with the current user language code. To get another language, just pass a second parameter to Route::get('product/details', 'en').
 
+Now, I got a controller that serves CSS files, I obviously don't need any language specified. To prevent the normal behaviour, just pass FALSE as the third parameter to Route::set like this :
+	
+	Route::set('file.css', 'static/css/<action>.css', array(
+		'action'			=> '[^/.]+',
+	), FALSE)->defaults(array(
+		'controller'		=> 'css',
+		'action'			=> NULL,
+	));
+	
+If you access http://www.domain.tld/static/css/custom_page.css, it will not redirect and Route::get('file.css.custom')->uri(array('action' => 'categories')) will not return the uri with a language code.
 
 ### Language selector menu
 
+Multilang::selector($current) returns a menu to select the language. It will keep the same page. The "current" parameter adds the current language in the menu or not.
+You can change the view file multilang/selector.php.
 
-	
+### Misc	
 
 To access the current language, you can use Request::$lang.
 	
@@ -94,4 +105,26 @@ To access the current language, you can use Request::$lang.
 If you have any suggestions, found a bug or anything, feel free to share.
 
 
-	
+### How it works
+
+See https://github.com/GeertDD/kohana-lang
+
+#### The URI does not contain a language code
+
+If somebody visits "http://www.domain.tld/page", without a language, the best default language will be found and the user will be redirected to the same URL *with* that language prepended. To find the best language, the following elements are taken into account (in this order):
+
+1. a language cookie (set during a previous visit);
+2. the HTTP Accept-Language header;
+3. a hard-coded default language.
+
+#### The URI contains a language code
+
+1. The language code is chopped off before the request and stored in Request::$lang.
+2. "I18n::$lang" is set to the correct target language (from config).
+3. The correct locale is set (from config).
+4. A cookie with the language code is set.
+5. Normal request processing continues.
+
+It is important to be aware that the *language part is completely chopped off* of the URI. When normal request processing continues it, it does so with a URI without language. This means that **your routes must not contain a `<lang>` key**. Also, you can create HMVC subrequests without having to worry about adding the current language to the URI.
+
+The one thing we still need to take care of then, is that any generated URLs should contain the language. An extension of `URL::site` is created for this. A third argument, `$lang`, is added to `URL::site`. By default, the current language is used (`Request::$lang`). You can also provide another language key as a string, or set the argument to `FALSE` to generate a URL without language.