Update README with translation instructions

Author: marcprux

README.md

@@ -19,8 +19,8 @@ It aims to inform on the impacts on consumers, developers, states and coordinate
 
 To provide a translation into a new language like Italian (language code: "it"):
 
-1. [Edit the index.md](https://github.com/keepandroidopen/keepandroidopen.github.io/edit/main/index.md) in a fork and re-name the file "index-it.md"
-2. Translate the markdown headers and page content. The most important text is at the beginning; the lists of links do not all need to be translated.
+1. [Edit the `_layouts/default.html`](https://github.com/keepandroidopen/keepandroidopen.github.io/edit/main/_layouts/default.html) in a fork and update the language menu at the end with the new language code.
+2. Create a new top-level file `index-<langcode>.md` and add the translation of the English `index.md` file. Translate the markdown headers and page content. The most important text is at the beginning; the lists of links do not all need to be translated.
 3. Commit changes to your fork and file a Pull Request with your translation.
 
 ## License