diff --git a/common/functions.php b/common/functions.php
index a1bd7234a..154d60455 100644
--- a/common/functions.php
+++ b/common/functions.php
@@ -25,6 +25,31 @@ function config($key, $value = null)
 	}
 }
 
+/**
+ * Get or set lang variable.
+ *
+ * @param string $code Lang variable name
+ * @param string $value `$code`s value
+ * @return mixed
+ */
+function lang($code, $value = null)
+{
+	if (!$GLOBALS['lang'] instanceof Rhymix\Framework\Lang)
+	{
+		$GLOBALS['lang'] = Rhymix\Framework\Lang::getInstance(Context::getLangType() ?: config('locale.default_lang') ?: 'ko');
+		$GLOBALS['lang']->loadDirectory(RX_BASEDIR . 'common/lang', 'common');
+	}
+	
+	if ($value === null)
+	{
+		return $GLOBALS['lang']->get($code);
+	}
+	else
+	{
+		$GLOBALS['lang']->set($code, $value);
+	}
+}
+
 /**
  * Get the first value of an array.
  *