Two ideas: language selection & start in system tray

I want to ask about two tweaks of Jami on Windows (and maybe other desktop OS). I think they should be no that hard to implement.

1. UI language selection.
In some cases there is a need to set UI language other than system. For example in my case Windows UI is English, location is set to country where I live and some local settings are set to yet another language I use most. So from 3 different settings Jami seems chose that based on location.
Another case may be when same app is shared among few people with different language preferences.

2. Go to system tray after starting
Every time I start Windows Jami app pops up. It’s good to have option (or regular feature) to force app to start only in system tray.