No configuration interface

Same (as well as no information on the module page). I downloaded and extracted the README, and it says that this module will allow everything I want (language links in their native language and hidden if not translated) but how do I configure it?

CONFIGURATION
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This module contains 4 configuration options:

## Display
Select how you want to display your language.
1. Using the language id, ie. nl / en / ....
2. Regular, translated language name ie English, Dutch, French, ...
3. Native language which uses the language name in their
native language ie English, Nederlands, Francais, ...

## Structure
Structure determines how we display the languages structure.
1. In a simple list
2. In a dropdown with the active language in the dropdown list
3. In a dropdown without the active language in the dropdown list.

## Hidden languages
We can hide languages from being displayed in the language switcher. Maybe you
haven't fully translated a certain language yet and want to soft-hide it for
your users. A permission is used to enable it for different roles.

## No translation
Select what we want to do when a entity has no translation, disable the link,
redirect to the homepage or do nothing.

You configure it on the block.