Problem: There is no information in the keycloak documentation how to get locale information (which language was selected in the locale selector in the keycloak login page) in your app, after successfully logging in.
There is one place in the docs about localization (https://www.keycloak.org/docs/latest/server_admin/#enabling-internationalization) but it is not what i needed.
PS. I'm using keycloak-js lib.