How to use drush config:set for translations? https://drushcommands.com/drush-9x/config/config:set/

For one language site the command is:

drush config:set system.site name "Drupal 8 English sitename"


But how to be, if the site is multilanguage, at example two languages?
Example: 


English site name: "Drupal 8 English sitename"
Italian site name: "Drupal 8 Italian sitename"


At example for site settings in web interface I can translate it in tab "Translate system information" http://take.ms/i9jUN.
But how to set translated config value with drush? It is possible?
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.