Hello Renato,
the way you chossed via importing DU's directly vom the HANA Studio is not the recommended way for doing that.
Please check the HANA LIVE Admin Guide for some infos.
The Recommended way which is documented there is the usage of "SAP HANA Lifecycle Manager".
This tool automaticaly takes care of Content and Language Import.
For more info please directly check within the Admin Guide, which you can find at:
Best Regards
Stefan