Tags Error Translate

hi,
i have a problem with the tags translation, because when i go to my portfolio in italian language i see all product in all tags category but if i change the language the theme show me only six product of one tags. I inserect all product in the two language and all tags are translate.
Can you halp me to understand the reason?
the site is: http://www.genghini.net/macchine-per-pasta-fresca/
if you change the language you don’t see all product.
if you need more information, tell me!

Thanks for your support