It appears you should be able to change the default interface language by:
Also, you can change the language code for entities by either:
$node = Node::load($nid); $node->get('langcode')->value = 'da'; $node->save();
Sources:
That being said, you would still need to change the actual content to the new language, as well (manually).
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It appears you should be able to change the default interface language by:
Also, you can change the language code for entities by either:
$node = Node::load($nid);
$node->get('langcode')->value = 'da';
$node->save();
Sources:
That being said, you would still need to change the actual content to the new language, as well (manually).