diff --git a/framework/yii/console/Application.php b/framework/yii/console/Application.php
index bbdd4e1..9ca7393 100644
--- a/framework/yii/console/Application.php
+++ b/framework/yii/console/Application.php
@@ -9,6 +9,7 @@
 
 namespace yii\console;
 
+use Yii;
 use yii\base\InvalidRouteException;
 
 /**
@@ -129,7 +130,7 @@ class Application extends \yii\base\Application
 		try {
 			return parent::runAction($route, $params);
 		} catch (InvalidRouteException $e) {
-			throw new Exception(\Yii::t('yii', 'Unknown command "{command}".', array('{command}' => $route)), 0, $e);
+			throw new Exception(Yii::t('yii', 'Unknown command "{command}".', array('command' => $route)), 0, $e);
 		}
 	}
 
diff --git a/framework/yii/console/Controller.php b/framework/yii/console/Controller.php
index fd6d0de..73b74f8 100644
--- a/framework/yii/console/Controller.php
+++ b/framework/yii/console/Controller.php
@@ -99,7 +99,7 @@ class Controller extends \yii\base\Controller
 					$args[] = $value;
 				} else {
 					throw new Exception(Yii::t('yii', 'Unknown option: --{name}', array(
-						'{name}' => $name,
+						'name' => $name,
 					)));
 				}
 			}
@@ -125,7 +125,7 @@ class Controller extends \yii\base\Controller
 
 		if (!empty($missing)) {
 			throw new Exception(Yii::t('yii', 'Missing required arguments: {params}', array(
-				'{params}' => implode(', ', $missing),
+				'params' => implode(', ', $missing),
 			)));
 		}
 
diff --git a/framework/yii/console/controllers/HelpController.php b/framework/yii/console/controllers/HelpController.php
index f0e72cd..678d9f9 100644
--- a/framework/yii/console/controllers/HelpController.php
+++ b/framework/yii/console/controllers/HelpController.php
@@ -58,7 +58,7 @@ class HelpController extends Controller
 			$result = Yii::$app->createController($command);
 			if ($result === false) {
 				throw new Exception(Yii::t('yii', 'No help for unknown command "{command}".', array(
-					'{command}' => $this->ansiFormat($command, Console::FG_YELLOW),
+					'command' => $this->ansiFormat($command, Console::FG_YELLOW),
 				)));
 			}
 
@@ -243,7 +243,7 @@ class HelpController extends Controller
 		$action = $controller->createAction($actionID);
 		if ($action === null) {
 			throw new Exception(Yii::t('yii', 'No help for unknown sub-command "{command}".', array(
-				'{command}' => rtrim($controller->getUniqueId() . '/' . $actionID, '/'),
+				'command' => rtrim($controller->getUniqueId() . '/' . $actionID, '/'),
 			)));
 		}
 		if ($action instanceof InlineAction) {
diff --git a/framework/yii/web/Controller.php b/framework/yii/web/Controller.php
index 6b8afa4..87edf82 100644
--- a/framework/yii/web/Controller.php
+++ b/framework/yii/web/Controller.php
@@ -60,7 +60,7 @@ class Controller extends \yii\base\Controller
 
 		if (!empty($missing)) {
 			throw new HttpException(400, Yii::t('yii', 'Missing required parameters: {params}', array(
-				'{params}' => implode(', ', $missing),
+				'params' => implode(', ', $missing),
 			)));
 		}