I've installed aspell with Homebrew and I've added the italian dictionary. Unfortunately aspell don't check words like "è", "necessità" because they are written in this way: "necessit\`a". How can I solve this problem? I launch aspell with:
aspell check capitolo1.tex --lang=it --mode=tex
\\awithà, of\`ewithè, etc and (b) issue the commands\usepackage[utf8]{inputenc}and\usepackage[T1]{fontenc}` to enable direct typesetting of lots of accented characters? Or is there a deeper reason for not using accented characters in your input file directly? – Mico Feb 17 '14 at 21:23