Thread:Extension talk:UniversalLanguageSelector/New user registration doesn't copy the detected language into their preferences

1. you open a wiki not being logged in.

2. It correctly detects your languages using ULS

3. You register.

4. After logging in the wiki starts to display pages in its default languauge.

How to make it copy detected language into your preferences while registering?

A separate question. Is it possible to automatically copy into your preferences the currently selected by the trigger language?