How to use the xili-language plugin?

Does anyone have any useful resources on how to use the xili-language plugin? I did not find any complete documentation from their part. I only found their blog with some examples but it’s not so easy to understand.

I want to test xili-language to translate our site.

The plugin’s page in official repository comes with considerable amount of notes and instructions.

There is also developer’s site that looks quite extensive and has forums.