Configuration and multilingual sites
The Configuration API allows for each value to be translated into each site language. These translations can be added in a few different ways.
Configuration forms
Any form that extends ConfigFormBase
will display a tab that allows users to translate the configuration elements.

Translate configuration tab
Clicking on the tab shows a list of system languages with buttons to Add
, Edit
, and Delete
translations for the form.

Language selection form
Selecting to Add
or Edit
the configuration in the language displays a form to allow translations. This form is built using the Configuration schema for the configuration names declared by the underlying configuration form.

Form translation
Configuration translation
All of the configuration elements can be accessed for translation by selecting Configuration
and then Configuration translation
from the menu bar, or by navigating to admin/config/regional/config-translation
.

Configuration translation list
Each configuration object...