Fixed a bug in CI_Lang::load()
diff --git a/system/core/Lang.php b/system/core/Lang.php
index 088cb6c..c40a685 100755
--- a/system/core/Lang.php
+++ b/system/core/Lang.php
@@ -130,7 +130,7 @@
 		}
 
 		$this->is_loaded[] = $langfile;
-		$this->language = $this->language + $lang;
+		$this->language = array_merge($this->language, $lang);
 		unset($lang);
 
 		log_message('debug', 'Language file loaded: language/'.$idiom.'/'.$langfile);