ProductName property a property of the page type or part of the SKU object? If it's part of the SKU object I don't believe those are translated. Only the page type data is sent off to be translated.
Secondly, when you imported all the translations, did you publish the pages? By default the import and processing of translations leaves them in a not published state. So the easiest thing to do is to go to Workflow and select the default workflow and publish the pages from there. Keep in mind, if you had any pages you didn't want published, this will publish them, so you'll have to manually archive them.