Code:
{$shipping_calc_service} {$lng.lbl_err_shipping_calc}
<FONT class="ErrorMessage">{$shipping_calc_error}</FONT>
{/if}
{if $shipping eq "" and $need_shipping}
<FONT class="ErrorMessage">{$lng.lbl_no_shipping_for_location}:</FONT>
theres some of the code that shows it.
look for the $lng entries in the languages area of your xcart admin