[keycloak-user] Keycloak: Get Locale used at loginpages localeswitch in application via Wildfly adapter

Hi everyone, another day, another question: So I am using Keycloak w/ the wildfly adapter and internationalization enabled for my application. What I want to achieve: 1. User gets to kc loginpage 2. user switches the locale (using keycloaks ftl locale dropdown here on a custom theme) 3. user logs in 4. a phaselistener (jsf used) is set up and checks the kc login. Here I have access to idToken and securityContext etc. via clientadapter. My Problem: In the app itself, there's a locale witch, too. I want to use the locale provided at login in my app, therefor I need to sync these two locales (keycloak is leading system). What I've tried: 1. Setting up a mapper for the builtin locale and check it in my phaselistener. Problem: this locale doesn't change, even when I switch languages before login. e.g.: - I switch language to "en" in loginpage - I login with my credentials - getIdToken().getLocale() says "de" 2. looking in the context for another localefield, but didn't find one Could anyone tell me how to achieve this? I really don't like to add a cookie to the request myself via js or something, for this should work with the adapter I think. Thanks and best regards, Dominik