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.

Price translation is crucial to display translated prices (eur [german lang] -> usd [english lang] for example). Any help is much appreciated.