Finish introduction of Friulian language
@tmtfx Thanks for adding a new translation. However, you have not performed all the steps listed in README.md. I can do the missing changes, but I need your help with one detail. docs/C/index.docbook and docs/C/index.withimg contain a list of the available languages, with the language name in the respective language (German becomes Deutsch, French becomes Français, etc.).
What's the name of the Friulian language in Friulian? I've found Furlan and Furlàn in Wikipedia.