Hi KR,
I see you're bulding your website based on loremipsum WP theme. I see this theme comes with a .pot file. Have you set the proper cs_CZ translation for your theme? I'm pretty sure these strings are there.
If you can't find them try to find in your theme's directory the file with the class "ait-woocommerce-cart-info", and look for a piece of code similar to this: <?php _e('Cart is empty', 'loremipsum or whatever'); ?>
If you find it, then try to update with poedit the xxxxxx-cs_CZ.po file adding the url of the file that includes the code.
Hope this helps!