I had something similar but then to the labels of the characteristics in the product view.
I could not use the standard translations method as the JText::_ was missing.
I thought I could find this in the \front\views\product\tmpl\show_block_characteristic.php
Unfortunately it was not there. Iin the end I found it here: \back\types\characteristic.php
In line 228 replace:
$html = $characteristic->characteristic_value.'</td><td>'.$html;
with:
$html = JText::_($characteristic->characteristic_value).'</td><td>'.$html;
Now I can add a HIKA_SHOE_SIZE to my language overrides and see it as "schoenmaat" or "shoe size" in the product page.
Since it cannot be used in template overrides, can this be added in a next version of HikaShop? It is then available for all of us.
I am looking for the similar when it comes to the values... then I can do the same with those instead of adding the extra ballast that comes with Falang...Though it is a good extension, I like to stick as close as possible to the core features of Joomla!