A browser language switching extention / plugin written and designed by Hlawuleka Maswanganyi A free browser language switching extension/plugin that's very simple to install and use, offers a very easy / intuitive way for adding and removing languages. Supports both bulk and single language deletion. Data is synchronized between Webextension's Storage and the native browser localStorage API (uses 'als-language' and 'als-languages' - for a JSON formatted object that shows the languages you've added for the selected group) as localstorage keys.
Reviews of Advanced Page Language Switcher extension