The EntityLang language shows some of the Spoofax basics, and comes with a short tutorial and screenshots. A basic version of language is included in the "new project" wizard.
Tour
Lua is a dynamically typed, lightweight, embeddable scripting language.
Spoofax-Lua is an Eclipse plugin for Lua built using Spoofax, featuring reference resolving, type analysis and content assist.
https://github.com/tvo/spoofax-lua#readme