How to use drush config:set for translations?
For getting the site name in Spanish for example it's

drush config:get language.es:system.site name


Unfortunately the following doesn't work and I wonder if this is a bug or what's missing.

drush -y config:set language.es:system.site name "Hello World"


This just gives me


  Invalid character in Config object name language.es:system.site.


Will update answer later.



Created an issue on drupal.org: drush config:set for other than default collections raises exception. Where I also provided a patch you may use if you are really in need right now.