Hi,
When Falang is installed, you have to go in the HikaShop configuration, in the "Languages" tab and activate the multi language option: Activate the edition of content in multiple languages.
After that, you would have little tabs in HikaShop product/category editing which would allow you to set 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.