There is two possible solution for this. You can decide which one fits you better:
1. Use different accounts for each of the languages. In this case everything is duplicated.
2. You can use the same account and:
import the items:
-a- use the automatic product catalog import - so you may will have the product attributes randomly in different languages
-b- use our catalog import so you can import all the languages: https://developers.gravityrd.com/wiki/display/RECO/Integration+overview#Integrationoverview-Itemcatalog
I hope this information was helpful for you. If you have more questions, please don't hesitate to contact us.