Hotizontal List

Hello @adaragao,

Unfortunately the scope of this module is just to replace the language name by the langcode on the core Language Switcher block.
Any customization on the styling of how the block is displayed should be done by other module or custom CSS on your theme. Not on this module.

I did a quick search and the closest issue/project I've found related with your request by far is https://www.drupal.org/project/drupal/issues/3127588 →

All the best.

Closing since the request is out of scope of this project.