Default language menulinks do not dissapear when changing to other language

Hi all,

I am creating my site and I am using the porto template.
My default language is Dutch. I want to translate my site into 3 other languages (german, english and spanish)

The problem is, the Dutch menu links are still shown in the main menu when changing to a different language.
So, I see the Dutch menu links together with the menu links I just translated (but only for one translated language)

Dutch language: works fine only Dutch is showm
German language: Dutch menu links are still there
English language: Dutch menu links are still there
Spanish: Dutch menu links are still there

Why are the Dutch menulinks still shown in my main menu?
How can I fix this?

Regards,
Mark

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed