[misc] Correct i18n calls from a controller

concepts/Internationalization/Internationalization.md

@@ -17,6 +17,12 @@ From a view:
 <p> <%= i18n('That\'s right-- you can use either i18n() or __()') %> </p>
 ```
 
+From a controller:
+```javascript
+sails.__('Hello'); // uses config.i18n.defaultLocale
+req.i18n.__('Hello'); // uses language from request header
+```
+
 
 ##### Overriding language headers
 

concepts/Internationalization/Locales.md

@@ -14,7 +14,7 @@ Here is an example locale file (`config/locales/es.json`):
 }
 ```
 
-Locales can be accessed in controller actions and policies through `res.i18n()`, or in views through the `__(key)` or `i18n(key)` functions.
+Locales can be accessed in controller actions and policies through `req.i18n.__()`, or in views through the `__(key)` or `i18n(key)` functions.
 
 ```ejs
 <h1> <%= __('Welcome to PencilPals!') %> </h1>