Background of the issue:
I am developing a site where Dutch is set as the default language. However, some products are currently using English as the default language.
Symptoms:
Some products are using English as the default language instead of Dutch.
Questions:
How can I change the default language of the products to Dutch?
Thanks for contacting WPML forums support. I'll be glad to help you today.
1) Please disconnect the translations and re-connect them. Kindly check this guide.
2) Could you please share your Debug information with me?
You can read a detailed explanation about it here. (http://wpml.org/faq/provide-debug-information-faster-support)
The debug info will give me much information about how your site is configured.