I have noticed that your site does not have WPML string translation active, In order for the WooCommerce Multilingual to work properly you need to enable WPML String translation along with WPML Multilingual CMS.
WPML String translation plugin can be downloaded and activated from Plugins > Add New > Commercial tab.select the plugin hit download and activate. This should solve your issue.
Hey Raja, sry, we didn't get any update notification for this topic. Seems like this issue can be solved by simply activating string translation at least one time. Even if you deactivate it afterwards the cart can be used as expected.