You want to show only Dutch language product to google merchant center not others. Is it your problem?
Todo this you have 2 way,
1. Goto other languages (without Dutch) product edit page and check the feed disable check box and update.
2. Goto feed generator form and select only dutch language products by unchecked the ‘Enable all products feed’ field and generate the feed xml file.
Now update this file to your merchant account and wait for google validation.