Order confirmation in wrong language

Hi all,

I have my website in Dutch and English. But when I make a testorder for myself I receive the order confirmation in English.

With the help of a Shopify expert I came a little further. When I make changes in settings it got partially fixed. I went to Settings > Markets > edit primairy language to Dutch and uncheck English and in International Market to English and Dutch. That did the trick, but if I do that any visitors from the Netherlands who want to change the language of the website to English can’t use this button.

It will simply don’t show the English option.

any ideas?