Hi,
HikaMarket is using the Joomla translation system.
When the HikaMarket is included, the HikaShop one is also includes ; and it's HikaShop which load the override file.
If the translation is not made in your page it means that there is an error in your translation override or you're not modifying the right file.
You can activate the Joomla language debug in order to have more details about the translations.
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.