Hello Pablo, > Would you be so kind to show me how the following sample could work in > LuaLaTeX?
It couldn't. You need to tell LaTeX to load the patterns, the most
straightforward way is by adding Babel with the ancientgreek option:
> \documentclass{minimal}
\usepackage[ancientgreek]{babel}
> \begin{document}
> \showhyphens{παθημάτων σύμβολα}
> \end{document}
(untested)
Arthur
