diff --git a/lang/addlang.sh b/lang/addlang.sh
index 2a49bace..034c1dc2 100755
--- a/lang/addlang.sh
+++ b/lang/addlang.sh
@@ -8,7 +8,15 @@ if [ "x$1" = "x" ]
    echo "available language file."
    exit 1
  else
-   find . -maxdepth 1 -name \*.php -exec ./append.sh $1 {} \;
+   if [ ! -f $1 ]; then
+    echo "$1 does not exist."
+    exit 10;
+   fi
+   find . -maxdepth 1 -name \*.inc.php -exec ./append.sh $1 {} \;
+   TIMESTAMP=$(date +"%Y%m%d%H%M")
+   mv $1 $1.$TIMESTAMP
    cd UTF-8
    ./recode.sh
+   echo "-------------------------------------------------"
+   echo "Please check the result and remove $1.$TIMESTAMP."
 fi