You don't need to duplicate your products.
But you will have to add the translations yourself. For that, you can use the integration we have with Falang. You will first need to download and install it
extensions.joomla.org/extensions/languag...ingual-content/18210
Then, install HikaShop on top of your current one in order to add the integration files to Falang, and you will be able to translate your products either directly in HikaShop if you use our commercial editions or in Falang with the Starter version.