What is the best solution for multi lingual static Web site with GUI?

​Hi,

I'm looking for a Static Site Generator with GUI i.e. a static version of Wordpress.

After some searches on the Web, I found many solutions (Netlify CMS, Lektor, Grav and Publii).

1. Which is the best solution in order to obtain multi lingual Web site via a plugin or without a lot of coding as with jekyll or other solution?
2. In theory, all the previous solutions should support gitlab or github page. Which one is the best?
3. Which one do you suggest to use?

Thank you