I'm not sure. You may want to contact customer service and ask them. I would think as long as she had wifi, she could use it. Below is the link you can contact them. They answered my question within 24 hours:
i dont see why not as long as the voltage is the same.
It runs android. So yes, you can set your language settings.
Yes! No problem, I have use it in Mexico with no problem.
The only thing that change is the Play Store because Videos, Magazines and Music are not supported in other country to purchase via Play Store, just in US, but you can download all the apps :)