Hello,
1 - Such thing is possible but would require some customization.
If you want to change that only for specific products ; best would be to use a product custom field so you can then determine if you want to display the classical translation or a specific translation.
Then, thanks to view override, you can change there the "PER_UNIT" translation is display and read the product custom field to determine which text you want to display.
www.hikashop.com/support/documentation/1...-display.html#layout
2 - I'm sorry but I don't understand what you want to do.
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.