I've developed a Commerce Site using Drupal Commerce. The project is started one year ago.
The Products Types was created using "Term Reference" Field connected to a "Localized" taxonomy vocabulary.
The user create the Products and later translate it using "Entity Translation". When all variants are created and translate this products are connectde to a "View Node" using a "Product Reference" Field.
The view node use Multilingual Support of Internationalization to translate it (there is not enable Entity Translation).
Well I have installed Entity translations and I have enable price field translations (in product type -> Manage fields -> Price -> Field translation - This field is shared among the entity translations. Enable translation).
But I get this error all the time "Notice: Undefined index: amount in commerce_price_field_formatter_view() (line 442"
Without price translation everything is fine but when I'm browsing the product and click at other language the price is still in EUR.