Drupal 8 migrate language: switch all nodes to the default lang Where testing the migration from drupal 7 to drupal 8 and everything almost works, except i'm running into a language problem.

I have two different languages enabled in Drupal 7, English(Default) and Dutch, but only for the interface, there is no multi-language setup for nodes. 

Now, when i imported the content in drupal 8 with the same two languages enabled, i get to see the content, but it is dived between three types:


Not specified
Dutch
English


I want to see all the content without selecting a language(via url, session, ..). So, how do change it so i can view my nodes without a language prefix in the url ?  

I already tried messing with the database and changing the 'langcode' to 'und' and that works, but it breaks many other things. I just want to see site.tld/my-cool-url-alias without anything else.
You need to change your language selection criteria in this admin setting:

Admin -> Configuration -> Regional &amp; Language -> Language / Detection and Selection Tab

You can turn off or configure the URL settings as you want.  With no standard detection, the default language should be shown.

You probably want to turn on the administration language detection option.  This allows admin users to select their preferred admin language.