Hello,
Thanks for contacting us.
https://docs.woocommerce.com/document/woocommerce-localization/ – please follow this article.
We provide translation files for the theme, but it is not full translation, read here -https://www.8theme.com/documentation/xstore/theme-translation/base-theme-translation/
Xstore Core plugin should be translated manually.
Do you want to create a multilingual site or just translate it to dutch?
Regards