Hi,
It is quite complicated for people who can't read text to find something (add a product in the cart to access to the checkout).
Without accessing to this page, I can't make any speculation except wrong translation or CSS problem.
If you set an article for the terms, HikaShop will display the link as a modal link (because it open a popup). If your template is not compatible with Joomla Squeezbox system, it is possible that the link is display otherwise in the page, like if the link itself was a popup (and not link which open a popup).
But at this moment you should have similar problem with the address edit buttons.
Well, without seeing anything.. it is just speculations.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.