Hi,
I don't see why that would be the case.
In the file components/com_hikashop/views/product/view.html.php you have the line:
$pathway->addItem(strip_tags($product_name), hikashop_completeLink('product&task=show&cid='.(int)$element->product_id.'&name='.$element->alias.$category_pathway.$url_itemid));which adds the product name to the breadcrumbs pathway.
And $product_name is defined before with the line:
$product_name = hikashop_translate($element->product_name);
So the product name in the breadcrumbs module's pathway should be the translated text.
And I can see that the product name displayed on the page is the translated text.
I guess it would require some debugging on your website near these lines of code to better understand what's going on.