Hi,
We do not use the language file from Joomla. HikaShop have his own languages files that you can download here :
www.hikashop.com/download/languages.html
Please update your HikaShop language file, because we add some new translations with new HikaShop releases.
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.