Board Thread:Support Requests - Getting Technical/@comment-44367830-20191125082928/@comment-1038387-20191125201019

Changing the language code would make the entire wiki German. They'd need to be split.

The most graceful solution to this situation would be:
 * Have the German user create a new wiki with the .de language.
 * Export/import the German pages to the German wiki.
 * Delete the German pages on the English wiki.
 * Consider using shared images to ease the transition.
 * Set up an interlanguage link between the two.