adibru on "Polylang not showing on mobile (responsive)"

so, first of all: I'm not a really high qualified wordpress user :)
i use polylang on my site (www.damien-brunner.com).. as you can see the 2 languages icons are on the top (right)
now as you smaller the browser my theme changes to mobile view.. and there is the problem.. polylang is not there anymore. it just disapears.. whats the mistake i make?

https://wordpress.org/plugins/polylang/