docs fixed

docs/guide/i18n.md

@@ -289,7 +289,7 @@ Examples
 
 ###Translating module messages
 
-If you want to translate messages for module and you dont use one translation file for all messages, you can make it like following:
+If you want to translate messages for a module and avoid using a single translation file for all messages, you can make it like the following:
 
 ```php
 <?php
@@ -310,8 +310,7 @@ class Module extends \yii\base\Module
 
 	public function registerTranslations()
 	{
-		$i18n = Yii::$app->i18n;
-		$i18n->translations['modules/users/*'] = [
+		Yii::$app->i18n->translations['modules/users/*'] = [
 			'class' => 'yii\i18n\PhpMessageSource',
 			'sourceLanguage' => 'en',
 			'basePath' => '@app/modules/users/messages',