<input type="hidden" name=coursemodule value="<? p($form->coursemodule) ?>">
<input type="hidden" name=modulename value="<? p($form->modulename) ?>">
<input type="hidden" name=instance value="<? p($form->instance) ?>">
-<input type="submit" value=" Yes "> <input type=button value=" No " onclick="javascript:history.go(-1);">
+ <input type="submit" value=" <? print_string("yes")?> ">
+ <input type=button value=" <? print_string("no")?> " onclick="javascript:history.go(-1);">
</FORM>
</td></tr></table>