From the screenshot you've shared, I can see that the Dutch translations are copied from English, which means the English contents will appear when you try to access that particular page in the Dutch language.
Would you please add the correct Dutch translation, instead of copying the contents from the English language and then check if that fixes the translation issue? You can check the documentation below on translating content using a classic translation editor.
But, if the issue you're having is something else than what I understood, I kindly request you to share more information regarding that. Try to include as much as information possible along with screenshots so that I can understand the issue properly and help you to find an effective solution as soon as possible.
