I have checked your website and I see that the mobile menu is derived from the desktop menu.
It seems that when the main menu is copied into the mobile menu, the click events on the flags are not being copied.
When I make the screen width narrow on desktop I see the mobile menu and there clicking on flags does nothing, so it is just because the copy procedure is not properly done.
It seems the copy logic is in /wp-content/themes/dt-the7/js/main.min.js file. You may consult your theme developer and ask for a fix.
Alternatively you can try to use Wrapper CSS selector option to render the selector into both desktop specific menu and mobile specific menu. To do that you need remove the current language selector and then set it to
div.mini-widgets div.show-on-desktop,div.mobile-mini-widgets-in-menu, so that it can be rendered into both menus. Hopefully it will not get doubled by copying it again.
You can also use our paid option, which does not need on click events.
- This reply was modified 1 minute ago by edo888.