Customization print button value on K2

I need to customize in Italian the value for print button on K2 with Shop and Buy Template. Unfortunately I've looked for but I don't know in which folder and in which files there is the following code:

<div id="btnWrapper">
<input type="button" id="printBtn" value="Print this page" onclick="document.getElementById('printBtn').style.display='none'; window.print(); return false;" />
</div>
<link rel="stylesheet" href="http://www.bontonsrl.com/templates/gk_shop_and_buy/css/system/print.css" type="text/css" />
<link rel="stylesheet" href="http://www.bontonsrl.com/templates/gk_shop_and_buy/css/system/print.css" type="text/css" media="Print" />

Please modify this key:

Code: Select all

TPL_GK_LANG_PRINT_BUTTON_TEXT


in
/language/en-GB/en-GB.tpl_gk_shop_and_buy.ini
file.