Having problems with importing and exporting configurations on drupal 8 and (probably language) config files appearing out of nowhere, this might be due to git and permission problem. To solve that just do this
git config core.fileMode false
or even globally
git config --global core.fileMode false
more on that here
Nature of this is changing of files permissions that somehow get caught by configuration manager and then you have "changes in files" but nothing really changes.