So in our shopify. Language switcher works fine in desktop version but not showing in mobile version.
We contacted the support and they send this link :
[login to view URL]
And "You can add your switcher in the mobile version by following this tutorial: How to change the position of the language switcher?. In your case, you can choose as target the following selector:
"#sidebar-menu > div > div > div" and it should do the trick "
Budget max 10$