I'm using import manager plugin to import 4 language as in file in attachment.
It seems work but the language are imported in wrong way
My feed file is
LanguageId Nome del prodotto
it-IT Rivestimento pavimenti adesivo - Black Marble 60x120
it-IT Rivestimento pavimenti adesivo - Blue Marble 60x120
it-IT Rivestimento pavimenti adesivo - Crossed Wood 60x120
it-IT Rivestimento pavimenti adesivo - Grunge 60x120