If the text occurs in the product lists then the ", save" is in the skin1/customers/main/products.tpl file in the line (look for the , save)
Code:
<font class=ProductPrice>{$lng.lbl_our_price}: {include file="currency.tpl" value=$products[product].price}</font><font class=MarketPrice>{include file="customer/main/alter_currency_value.tpl" alter_currency_value=$products[product].price}</font>{if $products[product].list_price gt 0 and $products[product].price lt $products[product].list_price}, save {$discount}%{/if}{if $config.Taxes.use_vat eq "Y" and $products[product].vat gt "0"}, {$lng.lbl_including_vat} {$products[product].vat}%{/if}