CLICK_HERE_TO_GO_BACK_TO_PRODUCT

after user fill the question form in the product page , I got this:

Mensaje

Tu consulta a sido enviada, te responderemos inmediatamente lo leamos gracias
CLICK_HERE_TO_GO_BACK_TO_PRODUCT

( there's not link )

Thanks

That's because your translation file does not contains the translation key CLICK_HERE_TO_GO_BACK_TO_PRODUCT.
Which means that you probably didn't update your translation file when you updated HikaShop.
If you do it via the tab languages of the configuration, that should remove the problem.