What if the the swicher disappears after switching languages? The reason may be that an item in the Metafield that decides to enable or disable switcher was translated by mistake. Kindly delete the translation from Metafield and save then the swicher can work properly.  Note: Here to know how to [add language swicher](https://localiseradmin.uppercommerce.com/help/article/16 "add language swicher").
Etranslate
Translate your store into multi languages
Etranslate
Translate your store into multi languages