I have copied the language folder from rtpanel to the child theme, started the Poedit program and gone to: File - New from POT-file.
Then I edited a few strings, and saved, the po and mo files are now in the child themes language folder, but the changes don't appear on the front end.
There are many tutorials on the internet, but they are different, say different things.
I come from the Required+ WordPress theme, which is now discontinued, but it had a Text Domain in the style.css, rtPanel doesn't.
Another tutorial said that you should put the string define ('WPLANG', 'da_DK'); in the the wp_config file, this does not work.
The folder wp-content/languages has da_DK.po and .mo files, what are they.
The folder wp-content/languages/themes has twentyfourteen-da_DK.po and .mo files, what are they and how are they created?