Hi,
To solve this problem, please go to the file app\design\frontend\default\sns_nova\template\sns\producttabs\navs.phtml, find and replace the code below
<span class="title-navi"><?php echo $item->title; ?>
By:
<span class="title-navi"><?php echo $this->__($item->title); ?>
Now, you can use the feature Translate Inline of Magento to change the title.
Thanks,
