[ticket/14044] Solve missing email template error

PHPBB3-14044

phpBB/phpbb/language/language.php

@@ -548,6 +548,16 @@ class language
 		}
 	}
 
+	/**
+	 * Returns the ISO code of the used language
+	 *
+	 * @return string	The ISO code of the currently used language
+	 */
+	public function get_used_language()
+	{
+		return $this->language_fallback[0];
+	}
+
 	/**
 	 * Returns language fallback data
 	 *