How to set the user language using Zendesk Messaging SDK?

Hi, I am considering migrating to use the Zendesk Messaging SDK on our Android app, but I have a question/issue related to the End User Language.

We use the End User Language to set triggers and assign the ticket to the correct agents.

The problem I have encountered while testing Zendesk Messaging is that for new users (unregistered on Zendesk), the language is always English, instead of the device locale, which in my test was Spanish.

Furthermore, if I modify the User Language from Zendesk to Spanish, when a new chat is started using Messaging, the User Language is overridden and set back to English.

How should I correctly pass the User Language information?
I'm using JWT for authentication.